The M.Zuiko 12mm f2

It’s one of the most beautiful lens I’ve seen. I know it’s not something you say to a photographic tool every day. But seeing the lovely metallic sheen, the cool, smooth and sturdy feel in my hands and the very snappy mechanical zone-focus is really a joy to use. Yes, finally Olympus delivered on a High Grade lens for the Micro Four Thirds in the form of the all-metal Olympus M.Zuiko 12mm F2. I had the chance to take this baby in the streets, albeit short, I was able to see how it performs.

The 12mm on hand is small

The M.Zuiko 12mm F2

The lens is very small for a wide angle 12mm lens (24mm in 35mm) yet very solid with its metal build. The ribbings are in the right places for proper contact on the lens and for the manual focus once the focus ring has been pulled back to enable manual focus. A feature I wish future M43rds lenses would have but that would of course raise the cost of the lens.

All-metal vs faux-metal

The M.Zuiko 12mm f2 only weighs 130gm and has a 0.2m close focus distance which I thought was pretty good. The lens really is an eye turner. Side-by-side with the stellar M.Zuiko 45mm f1.8 you could really see the difference from the 45mm f1.8 faux-metal finish.

The Olympus E-P3 with the 12mm lens

Impressions

So I took the 12mm lens with the E-P3 and shot at the streets of Hidalgo. I know the short span of time won’t be enough to really gauge the capabilities of the lens but here are my initial impressions.

• Focus speed is fast and accurate
• The snap manual focus is really responsive making me use the feature once in  awhile even if I’m used to Autofocus
• Noticed some slight distortions but can be corrected on post-process

Man with funny hat (1/160, f4, ISO 200)

Sample Photos

I had the lens for a week but with the lousy weather and lots of things to do I couldn’t take it out on the field. Here are some shots I took on the streets of Quiapo for an hour before I took the lens back. Light condition was gloomy.

The Olympus M.Zuiko 12mm f2 is now available in the Philippines for an SRP of P36,000

Hidalgo Vendors (1/125, f3.2, ISO 200)

Fan Vendor (1/200, f4.5, ISO 200)

Candles (1/250, f 3.5, ISO 200)

Fan Ladies (1/200, f3.5, ISO 200)

Fortune teller (1/200, f4, ISO 200)

Lucky Charms (1/125, f2.5, ISO 200)

Quiapo Church Interior (1/80, f2.2, ISO 1600)

Fruit vendor (1/100, f2.5, ISO 200)

The Olympus E-P3 with 14-42mm Ver II

The new generation PEN came a bit late here in the Philippines but like they said, its better late than never. I had the chance to try out the Olympus PEN E-P3, the current PEN flagship camera from Olympus. It was only a little over a week which clearly for me was such a short time since I wasn’t able to really take it out on a trip which I usually do the test. And also the weather at that week wasn’t really cooperative. But hey, I was able to take some shots with the E-P3 and play around its new functions and menus.

The E-P3 front with the 12mm f2 lens

The Look

The styling hasn’t changed since the E-P1 which is good since I like the all-metal retro styling of the camera. The notable changes on the outside are:

• the control function wheel has been moved to one side to give way to a built-in pop-up flash
• the bigger touch-sensitive OLED 640,00dots screen
• a direct movie button at the back
• a small AF illuminator at the front
• detachable and customizable grip with screw

The camera rear and controls with the new large OLED Screen display

Inside the Machine

While there are no drastic design changes on the exterior, it’s the internal workhorse that’s been given a major upgrade. Here are the significant changes

• Updated (tweaked) 12MP Sensor
• Dual-Core TruePic VI processor
• Which results to a brand new 35-area Superfast Auto Focus System
• Touch Shutter and Touch Focus with Magnification
• 1080i60p AVHCD Movies (which I wasn’t able to test out)
• Now Auto Gradation can be tweaked to a certain degree

The Control Mode Dial have all been moved to the right top to give way for the flash

Speedy Focus

If you’ll ask me one good reason to upgrade or jump in to the new generation of PEN line, it’s their new Autofocus System. The PEN has been criticized for its mediocre AF but this new 35-Area Autofocus System makes the whole camera competitive in all rounds. During my test focusing was astonishingly fast especially with the new lenses like the 12mm and the 14-42mm Ver II kit lens. And as I promised on my 45mm f1.8 review, the lens indeed focus more accurately with the new AF system. The Touch Shutter is also very responsive. Too responsive I guess that I had to make sure it’s off since it activate when it comes in contact with your body while the camera dangles on your neck.

While it has improved on a per shot basis, continuous shooting at burst mode and tracking movement has improved a little. Shooting RAW + JPG still slows down the frame rate sooner than expected that’s why when I attempt to shoot action I just shoot JPGs. I would also recommend Memory Cards with faster writing benefit to reduce the buffer time. Clearly the PEN is not ideal for sports but still it’s not impossible with perfect timing once you get used to it.

Touchy Screen

A feature that’s coming into new camera nowadays is the touch screen. While some may think it’s a novelty, when properly used it can be a powerful tool. Let me say first that the OLED screen on the E-P3 is a pleasure to view seeing the crisp colors and details. The Touch Shutter and Touch Focus features are a welcome addition. The Touch Focus enables you to choose a focus point on screen and magnify. This would be great for stills and macro work.

Playback viewing is also enhanced by this touch screen as you can scroll through the photos with the flick of a finger and zoom-in on them.

Olympus E-P3 using 45mm 1.8 (one touch WB, 1/100sec, f 1.8, ISO 2500)

Image Quality

I have no clear-cut way to measure the technical improvements on this generation of pens aside from my eyes. Though I can say it’s not that big, probably only a notch from the previous generation since it uses only a tweaked sensor and a better processor. The 1600 ISO which is the limit I use from my E-PL1 is a lot cleaner here and the lower ISOs still retain an excellent amount of details as usual. The good thing with the E-P3 is that the user can also customize the degree of sharpening and noise reduction on the images.

100% image crop of the bottle

Metering is well balanced, white balance is still spot on and colors straight out of camera are still punchy as usual. Auto-gradation or Shadow Highlight controls also have a degree of levels to choose from.

E-P3 with 12mm (f2.2, 1/80sec, ISO 1600, WB Auto)

Verdict

The Olympus PEN E-P3 is really a head-turner of a camera and is still an enjoyable photographic tool to use similar to previous generations. The blazing fast autofocus is a great enhancement and will surely make the camera more appealing now. The E-P3 now also has a built-in flash, AF illuminator and a handy touch screen feature. But there’s a quandary for owners of the previous PENs who are looking for major improvements in terms of Image Quality because there isn’t a big significance here. So if the newly added features aren’t such a big factor to upgrade, better stick with your old PEN for a while. But if you are looking for a well-rounded and capable camera and is jumping on the mirrorless or compact camera system, the E-P3 is an excellent choice given an already good range lenses on the Micro Four Thirds system.

E-P3 with 45mm (f1.8, 1/40sec, ISO 1600, WB Auto)

E-P3 with 12mm (f2.5, 1/125sec, ISO 200, WB Auto)

E-P3 with 45mm (f1.8, 1/100sec, ISO 1600, WB Auto)

Up Next: More E-P3 Samples Images with M.Zuiko 12mm f2 lens

The Olympus PEN E-P3 is now available in the Philippines. The SRP for the E-P3 body with 14-42mm ver II kit lens is P44,750.

The Olympus 45mm f1.8 lens

I’m loving prime lenses more and more. Lately I find myself using them a lot often when I travel. It started when I got the excellent Panasonic 20mm Lumix pancake and now the Olympus M.Zuiko 45mm f1.8 added another dimension to my shooting style. Spending 3 weeks with the lens on actual travel made me learn more about its quirks, its strengths and handling. From the initial unboxing, I knew this lens was worth the money I spent. Now here’s my assessment of the lens and some real world samples to boot.

Ananda Pagoda Kid (E-PL1, f1.8, 1/160sec, ISO 200, WB Auto)

Ananda Kid 100% crop

Build

I have pictures comparing the lens to the size of the 20mm pancake and attached to the Olympus E-PL1. It’s light and compact. Its plastic build and painted finish made me question the integrity or quality of the lens. It worries me that I may easily scratch or peel the paint after several uses since I’m quite torturous and rugged on my gears but I had no problems so far. It has a small 37mm filter ring which can be challenging to find. I also didn’t notice until I was shooting with it for a few days that it has a detachable ring at the front covering the lens hood attachment. I almost lost that ring as it was easy to loose so throughout the trip I decided to just remove it and place it in a secure pouch. The focus ring is quite fluid as well.

Pyin U Lwin Girl (E-PL1, f2.5, 1/250sec, ISO 200, WB Auto)

Pyi U Lwin Girl 100% crop

Focusing

I think the E-PL1 isn’t the ideal camera to gauge the speed of this lens. While I thought it was a lot faster than the Panasonic 20mm, I found that on rare occasions, the camera doesn’t focus where I want it to be, making me refocus again , especially if the lighting wasn’t as bright. What I would do is just select the focus point I would need for the shot. I’m not sure if it’s the old E-PL1’s focusing fault but I’ll be able to try the lens on the new PENs (E-P3, E-PL3 and E-PM1) soon and give an update.

Monk's Robe Weaver (E-PL1, f1.8, 1/160sec, ISO 800, WB Auto)

When shooting portraits, I found that enabling face detection does help in making the focus precisely even if all the focus points on the E-PL1 are active. When shooting objects, its best to direct the focus point on where to focus, especially when shooting wide open where it’s easy to miss the correct focus having too shallow a dept-of-field.

Caysaysay Kid (E-PL1, F2, 1/320, ISO 200, WB Auto)

The 45mm isn’t a Macro lens though and the closest focusing distance is .5m (which is actually better than other lenses of same focal length). Though I wish it was able to do macro but that would surely shoot the price up on this already affordable lens.

Applying Thanaka (E-PL1, f2, 1/320sec, ISO 200, WB Auto)

Applying Thanaka Crop 100%

Handling

For my shooting style, I find the mid-telephoto range of 90mm appropriate when shooting on the streets as I just need a moderate distance from my subject. Not too close for comfort nor too far like a paparazzi, just enough to get involved with the subject for some friendly chitchat. I also find that its size as an advantage as it’s less obtrusive and intimidating with people.

Umbrella Offering (E-PL1, f3.2, ISO 200, WB Auto)

Umbrella offering 100% crop

Image Quality

Don’t expect this to be a technical review but I’ll let you judge for yourself by the photos I post here, 100% crops with no sharpening and accompanying data. But what I do know personally is that even shooting wide open at the largest aperture of f1.8, it produces sharp images and good overall details at the centre and it just gets better as I stop down even up to f2.5. Color rendition and contrast looks excellent from my eyes and has that natural look. I found I don’t have to adjust as much on my RAW images. Bokeh is simply stunning and it definitely produces the sharp isolation between subject and the background (even foreground). Something a lot of photographers look for portrait shots.

Monastery Monks (E-PL1, f1.8, 1/100sec, ISO 320, WB Auto)

High ISO shots up to 1600 still has a lot of details to show and the large aperture plus in-body image stabilization of the pen is an ideal combination when shooting lowlight handheld.

Myazedi Bathing Buddha (E-PL1, f3.5, 1/400sec, ISO 200, WB Auto)

Myazedi Bathing Buddha 100% Crop

Conclusion

The Olympus 45mm f1.8 is something to celebrate about since it is the first lens from Olympus 43/m43 system to go below f2. And for a large aperture lens, its diminutive size packs in a performer that produces excellent output straight out of the camera. But is everything bright and shiny with this lens? Not really. The build could be better and adding macro capability would be a welcome addition, but that’s asking too much already for its $400 price tag. Besides, its plastic built doesn’t hinder from producing images with tack sharp images with creamy bokeh and swift focusing speed.

Shwedagon Candle Lighting (E-PL1, f1.8, 1/60sec, ISO 800)

The Polaroid Pogo Printer in the box

Many shutters have been clicked, so many people have been photographed, so many smiles have been captured. Yet it’s rare that I get to return the favour of sharing their moments with us photographers. I wanted to give something back, even as simple as giving their own photo.

When I saw the Polaroid Pogo printer for the first time, I thought it was a very handy device to give instant photo to people. Its introductory price was steep two years ago (about P4000+) but when I saw it a couple of months ago it has gone down to half its price and thought about getting one. I thought it would be useful to bring to Myanmar where I could give photos so select individuals so I bought a unit.

The Pogo size comparison with a mobile phone

The Printer

The printer itself is small and handy, slightly larger and thicker comparing it to the size of popular smartphones, in this case, I compared it to my Nokia N8. On one side is the compartment where the paper is fed (max 10), on one of the longside is the interface for the power while the other is the interface for the USB and power button and indicators.  It’s pretty straightforward and easy to figure out.

The charger is quite large for the printer

One disadvantage I saw here is the huge charger which is almost the size of the printer itself. I hope the next time they’ll make use of a smaller charger. That in the way, I just make sure I fully charge the unit (which takes about 2 hours+) to make sure I can print about 14-15 photos on full charge.

ZINK Papers

The ZINK Paper

The box comes with an initial set of 10 ZINK paper. The Polaroid Pogo uses ZINK technology paper where the paper has crystals which reacts to heat and then produces the photo. It’s pretty neat and instant like the good old Polaroids except that you don’t have to shake it on air or tap it. It’s also water-resistant and has an adhesive back to make use of it as a sticker. The papers can be bought locally for P180 for a 10 set piece. Not really cheap so it’s worth thinking which ones to print.

Printing via bluetooth

Printing

The printer can be loaded with up to 10 piece of ZINK paper including a SMART Paper which comes with every paper set. That SMART paper placed under would automatically spit out by the printer then it would be ready to print with the actual paper. There are two ways to print – USB and Bluetooth.

Connecting the device through bluetooth

Most Bluetooth capable phones can connect with the printer. Upon initial device recognition and connection, you can then browse through the gallery for the image you choose then “Print” in the menu. Just choose the Polaroid Pogo as the printer. One minor quirk though that led me to an hour of troubleshooting. Once the device has been recognized and trusted by the device the “Print” command no longer works, instead I found “Send” the image to the printer would do the work. I’m not sure if it is just the Nokia phone but it kinda made me panic a bit at first.

Printing via PictBridge

The other way is when connecting the camera directly to the printer via USB. Most cameras nowadays have PictBridge like my Olympus E-PL1. This was a lot simpler to do. Just connect the camera and choose the Print option. The gallery would open. Just choose the photo and print. There are other options like the number of copies.

Direct to Camera Printing is easy

One thing missing though is connecting it directly to a computer. I hope they add that feature on future releases.

Print time and image transfers usually take about a minute or so.

The Polaroid Pogo Printer produces decent prints

Print Quality

I wasn’t expecting top notch quality like let’s say the Canon Selphy which is a larger 4R portable printer. But I was quite satisfied with the decent quality of the prints which is good for posterity purposes. It has the grainy and instant quality to it. I do notice that dark photos when printed turns out a bit muddy that’s why I try to brighten them up in-camera first before I actually print them.

Giving photos prints as a way of saying thank you

Verdict

When I was in Myanmar, I had the chance to use the Polaroid Pogo Printer and it amused a lot of people when I hand them instant prints. My horsecart and motorbike drivers really appreciated it they have a photo along with the payment I gave. A family I met with two talented sons was very happy having their family photo. The mom kept looking at it and smiled back full of gratitude.

I guess it works and it gives me chills when people appreciate it. It may not have the top quality printout but it’s the thought that really counts here. I didn’t have trouble bringing the printer when I go out to shoot (of course leaving the charger at the hotel) nor had trouble printing out once I knew how. Polaroid Pogo is a fun little toy I really enjoyed using. It definitely has a place inside my photo bag.

The Kata Hybrid

In my continuous attempt to keep my travel gear light as possible for my personal travel, I’ve been looking at some options in terms of camera bags. Before, I had two bags with me, my Kata Sensitivity Bag and my regular 30-liter Deuter Backpack. While I really like the efficiency of the Sansitivity-V for its size, it’s really hard to travel with 2 bags in tow, especially when you’re always on the move. When I found the Kata Hybrid-537 D-lite Shoulder Bag while doing some window shop on a camera store, I thought it was ingenious that I can remove the compartments making it more compact if I wanted to so I bought one at Island Photo. After months of having it with me, here what I thought of it.

The Kata Hybrid-537 DL at Php 2400

Compartments can be detached into two separate cases

What I liked:

• First thing I liked is how I can detach the compartments so I can use either one when I need a compact camera case. And it’s easy to attach them via the secure velcro straps.
• It has the same light material as my Kata Sensitivity-V which I really like.
• It comes with a rain cover that can be folded to a compact size
• The shoulder strap feels comfortable
• I has the Modi-verse feature which I can re-arrange the division inside the large compartment
• The main compartment is spacious enough that with my Mirrorless system, I can fit my camera as well as 2 additional lenses with my filters in them. It could also fit a regular DSLR with a standard lens attached and another lens on the side.
• There’s an option to carry it on the waist via a belt loop
• There’s also a strap included if I would want to put a small tripod/monopod as well but since I have a big tripod I never used it.
• Great value for only P2400

The main compartment can fit my Olympus PEN, 3 more lenses and filters

What I didn’t like:

• It can be hard to zip close when it is bent out of shape while carrying if the content is heavy.

As you can see, there is a lot to like about this Kata Hybrid Bag. I found that for me a shoulder bag is more efficient to use than a back pack. For an instance when I’m traveling and suddenly I found a spontaneous subject on the road, I can easily access the camera on the side to shoot as opposed to a camera on my backpack which I have to remove from my back, unzip and pull out from the bag. A lot of seconds lost. By the time I have the camera in hand, the subject would have been far away. But that’s just my style and I found the Kata Hybrid-537 DL  Camera Bag works for me.

The smaller compartment can be used for additional accessories

Comes with its own rain cover

The JJC vs Clik Wrist Strap

Lately in my attempt to keep my gears light and accessible, I’ve been exploring different ways of bringing and using my PEN cameras. One was to get rid of the bulky and sometimes uncomfortable next strap. For one thing I no longer want to bring my camera dangling like a bling bling. I prefer to keep it in a plain messenger or shoulder bag where no one could see but I can easily pull out when I needed. But just to keep my camera secure on hand I want to have a wrist strap for support. I’ve been looking for a few straps and found the JJC Neoprene and Clik Wrist Strap. So which one found a place with my camera.

The JJC Neoprene Strap

The JJC strap on wrist

The first camera wrist strap I bought was the JJC Neoprene Wrist Strap. I was actually looking at this on e-bay and was about to buy it. Good thing I found one at Pixel Pro for a much cheaper price of P500. What I liked about the wrist strap is the softness of the neoprene strap, the secure loop on the camera and the option to detach it. But my main problem here was the Velcro grip, it’s not as secure as I expect it to be so I was always worried it would fall off. For a regular compact camera this might not be a problem but if you’re using a PEN or other mirrorless cameras or light DSLRs the Velcro can’t handle it. Another is that it’s not that breathable that I find the area covered by the neoprene sweaty.

The Clik Wrist Strap

The Clik on Wrist

The Clik Wrist Strap I found accidentally when I visited Digital Walker. It has a higher price tag of P864. I bought it and tried it out on my recent trip in Mindanao. What I liked about the Clik is that it’s more secure since the strap loops into the camera and cinches easily on the wrist. It tightens when I let the camera loose so it’s a lot secure than a Velcro. The strap padding is also made from a light material and breathable on the skin. Now if only there were variant colors to choose from.

Verdict: I think it’s quite obvious by now that the Clik Wrist Strap earned a place beside my PEN. It may be more expensive but I’ll gladly pay the extra for the secure loop and more comfortable strap.

The clear winner on the Wrist Strap face-off

Olympus PEN E-PL2 now in the Philippines

Now on its 4th PEN, Olympus displayed evolution on this new M43rds model. The Olympus PEN E-PL2 is their most recent release which is by naming convention is a successor to their E-PL1 which proved successful at launch. As a user of the Olympus PEN E-PL1 for more than a year now, E-PL2 is more like a beefed up version of the E-PL1. It has the same sensor with a few tweaks so Image Quality is more or less the same. What significantly changed is the body. So here are a few things I liked from the new E-PL2. Also you can see a few hi-resolution out-of-the-camera real-world sample shots which you can access at my flickr account.

Olympus E-PL2 (left) vs E-PL2 (right)

Sleeker Look and Better Handgrip. I always thought the E-PL1 was too boxy. Most of the time I’d like to dress it up with its leather case to make it look attractive. The E-PL2 was a lot sleeker with its more rangefinder-like body. It’s like a cross between the E-PL1 and the E-Px line. The grip now is wider and more comfortable to hold than the E-PL1. The silver, white and red colors look more attractive to me than the black one.

Larger 3" 430k dots screen

Shutter Speed Reaching up to 1/4000. I think this is the most significant of the changes. The E-PL1 can only go as high as 1/2000 which poses a problem when your shooting with an aperture wide open with a lens like the Panasonic 20mm f1.7 on broad daylight.

Control wheel is better than the E-PL1 buttons

ISO up to 6400. While I’m not really a High ISO shooter, it’s comforting to know that the feature is there. I had a situation before where I had to boost my ISO to 6400 when I was inside a bus to shoot this little girl across the row. It proved useful and handy especially with Olympus having in-body Image Stabilization.

Bigger shutter button and different on/off button

Rear Control Wheel. I really didn’t like the button pushing on the E-PL1 but I got used to it again but each time I use it, I always thought the controls on the E-P1/2 were more convenient and faster to use when changing settings. Well it’s a good thing they brought back even one of the dials. While it still poses the same problem I had with the E-P1 like accidentally changing the settings, it’s still a welcome development. And now we have an option to even lock the wheel through the menu.

Faster, slimmer, taller and MSC compatible 14-42mm II Kit lens (right)

New Faster and Silent MSC kit lens. The new 14-42mm f3.5-5.6 kit lens is still collapsible but smaller, slimmer, slightly taller and only has one protruding barrel in front. While I think the quality didn’t change much, the speed on this new lens spells the difference. It now has an MSC (Movie and Stills Compatible) design that makes the AutoFocus a lot smoother and also quiet which is ideal when shooting videos on continuous autofocus.

Higher capacity battery with the new BLS-5

Better LCD Screen. It’s about time Olympus upped their resolution to 430k dots, it helps a lot when manual focusing especially on a large 3inch screen. It’s also a lot appealing when reviewing photos

The excellent VF-2 EVF (Electronic Viewfinder) and other accessories can be attached

Better Battery. The new gray BLS-5 still has the same size as the previous PEN battery BLS-1 but with an added contact which is a new japan specification for improved efficiency when charging batteries. The E-PL2 is still compatible with the BLS-1 but the chargers are not interchangeable. I also noticed when I was shooting a festival that the new BLS-5 can shoot more images. With a fully charged BLS-5 I was able to shoot up to 500 jpg images while with the BLS-1 I reached only up to 300 jpg images.

Using the Dramatic Tone Art Filter of the E-PL2

New Art Filters. The E-PL2 also has the Dramatic Tone Filter as the Olympus E-5. I thought this was really attractive to use for that similar HDR effect but of course it has to be used appropriately.

Was able to shoot him at f2.8 ,1/4000s at broad daylight

Copyright Embedding Options. Now I appreciate little things like this. I was always envious of other camera brands when they can embed their signatures on the EXIF file via a copyright option in the menu. I first saw this on the Olympus E-5 and I was glad the E-PL2 has it. Olympus should have it as a staple option on their cameras from now on.

Shooting ISO 6400 with the 40-150mm M.Zuiko

To Upgrade? If you think the improvements I highlighted where important enough to help ease your shooting, by all means upgrade.

A cup of hot choco using the 14-42mm II kit lens

For New/Potential Buyers, if you are looking to jumping into the mirrorless camera world or just want to have a camera with the same quality as DSLRs but not the bulk, the Olympus E-PL2 would be a good choice as its a very well rounded camera especially for its price. Recently, competitors churned out a good number of mirrorless options as well but the advantage with Micro Four Thirds is that they already have a good lens system available. Not to dismiss the E-PL1 as well as it had a big drop in prices making it as the same level as some advanced compact cameras making it a good option too.

E-PL2 with 40-150mm M.Zuiko

I didn’t say much about the image quality as like I said it’s very close to the Olympus E-PL1 which I thought was a really good camera by itself. But having tried shooting with the E-PL2 for almost a month I found it a lot more enjoyable with this improvements.

E-PL2 with 40-150mm M.Zuiko

The Olympus PEN E-PL2 is now available in the Philippines at major camera store outlets. The single lens kit with the version 2 of the 14-42mm kit lens has an SRP of P33995 while the two lens kit with the 14-42mm and the new M.Zuiko version of the 40-150mm kit has an SRP of P39995. It comes in colors of black, white, silver and red.

E-PL2 with the 14-42mm II Kit Lens

E-PL2 with 9-18mm Zuiko via adaptor

E-PL2 with Lumix 20mm f1.7 pancake lens