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darosa View Drop Down
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Posts: 14195 		Post Options Post Options   Quote darosa Quote  Post ReplyReply Direct Link To This Post Posted: 16 September 2015 at 00:11
Ready for and looking forward to Pancake weekend!
 



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nandbytes View Drop Down
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Posts: 3630 		Post Options Post Options   Quote nandbytes Quote  Post ReplyReply Direct Link To This Post Posted: 16 September 2015 at 00:18
Originally posted by mikey2000 mikey2000 wrote:

Anand, I've decided (for myself) that the SELP16-50 isn't really a pancake. It's sort of pancakey when switched off (which I love) but looks a bit big when in use.   My guess is that the FE35/2.8 is a bit borderline - I'm interested in what the jury says about that one....   I w


I take you point. But 16-50mm is commonly referred to as the pancake zoom and also one of most easily accessible lenses for e-mount natively. So it would make this challenge more accessible to more people.


Originally posted by darosa darosa wrote:


A pancake is a flat cake, often thin, and round.
Mutatis mutandis:
A pancake lens is a flat lens, often thin, and round.

So square lenses are out!

The basic ingredient of a pancake lens then would seem to be: thin, flat, short (on the original camera).

How's that for a rule?


still doesn't strictly define what a pancakes is, ones mans thin is another mans thick (sorry being an engineer I prefer numbers and specs than block of text )

Anyway thanks, I got my answer. so I guess that leaves just the 16mm and 20mm for native lenses.

Edited by nandbytes - 16 September 2015 at 00:32
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ifreedman View Drop Down
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Posts: 4936 		Post Options Post Options   Quote ifreedman Quote  Post ReplyReply Direct Link To This Post Posted: 16 September 2015 at 01:58
Ok, I'll give this a a try with my industar 69... although life is so busy, so no promises. I also have an industar 22, which isn't exactly a pancake, although it's pretty darn thin when it's collapsed. To shoot you need to put it out, like some old Leica Elmar lenses, and not dissimilar in spirit to the sel16-50. I've made a len out of a pair of old glasses before. Those are as thin as a pancake I suppose, although I seem to recall that it was only suitable for macro work.
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mikey2000 View Drop Down
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Posts: 11659 		Post Options Post Options   Quote mikey2000 Quote  Post ReplyReply Direct Link To This Post Posted: 16 September 2015 at 09:28
How about this for a criteria: depth < half diameter ?

And also:

Order dispatched: Pentax M42 fit Industar 50-2, 3.5/50, Tiny 50mm FF lens, fits M42 camera mount
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nandbytes View Drop Down
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Posts: 3630 		Post Options Post Options   Quote nandbytes Quote  Post ReplyReply Direct Link To This Post Posted: 16 September 2015 at 09:57
Originally posted by mikey2000 mikey2000 wrote:

How about this for a criteria: depth < half diameter ?


I was thinking about this before I went to bed last night (so not for long ) but basically considering we are on dyxum after all, people shooting purely native lenses (a and/or e-mount) should be able to take part in any and all challenges.

Anyway, I am waiting on my pancake myself. Probably won't arrive by the weekend
fingers crossed...
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pegelli View Drop Down
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Posts: 38507 		Post Options Post Options   Quote pegelli Quote  Post ReplyReply Direct Link To This Post Posted: 16 September 2015 at 10:17
Originally posted by mikey2000 mikey2000 wrote:

How about this for a criteria: depth < half diameter ?
Some of the Industars don't meet this criteria, and neither does the Rokkor-X 45/2

I would propose the criteria for being considered a pancake is that they should be on the list linked earlier (as real or honorary pancake) and if they're not they need to meet the depth < half diameter test.
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Snegren View Drop Down
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Posts: 6454 		Post Options Post Options   Quote Snegren Quote  Post ReplyReply Direct Link To This Post Posted: 16 September 2015 at 11:36
I am assuming depth does not include the adapter, as this would disqualify most non-native lenses.

Diameter would then refer to the lens barrel?

Edit: Anyway, I am asking this because I want to go with my 1930s Trioplan, which is about 1 cm thick hence fairly pancake. But the same optics mounted in a barrel with Exakta mount is tiny but not pancake.


Edited by Snegren - 16 September 2015 at 11:42
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Bob J View Drop Down
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Posts: 27336 		Post Options Post Options   Quote Bob J Quote  Post ReplyReply Direct Link To This Post Posted: 16 September 2015 at 11:41
I think you could allow yourself the widest part of the diameter of the lens..
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mikey2000 View Drop Down
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Posts: 11659 		Post Options Post Options   Quote mikey2000 Quote  Post ReplyReply Direct Link To This Post Posted: 16 September 2015 at 14:31
On another note - is it utter madness to consider a MFT lens adapted to e-mount? My mum has an ultra flat Panasonic wide angle for her little panny CSC.   I suppose there may be a small chance the image circle may cover a larger area in the same way some aps-c lenses cover a decent part of a full frame.

However, I suspect focus and aperture may be fully electronic, so I think it may be difficult/impossible
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nandbytes View Drop Down
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Posts: 3630 		Post Options Post Options   Quote nandbytes Quote  Post ReplyReply Direct Link To This Post Posted: 16 September 2015 at 14:33
would pinhole count towards this?
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mikey2000 View Drop Down
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Posts: 11659 		Post Options Post Options   Quote mikey2000 Quote  Post ReplyReply Direct Link To This Post Posted: 16 September 2015 at 14:42
I would support pinhole fully! Pinhole is surely the ultimate pancake... Extra kudos if you mount a syrup lens in a hole in a real pancake. (Using tin foil is so "conventional")
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darosa View Drop Down
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Posts: 14195 		Post Options Post Options   Quote darosa Quote  Post ReplyReply Direct Link To This Post Posted: 16 September 2015 at 15:46
Mike: there is a MFT > E-mount adapter. I have one. There are some lenses that have an adapter for MFT but not for E-mount. So I use the MFT adapter and then the MFT > E-mount.

No electronics so all manual (no problem with old lenses of course).

nandbytes: pinhole are very welcome
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Hiro View Drop Down
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Posts: 438 		Post Options Post Options   Quote Hiro Quote  Post ReplyReply Direct Link To This Post Posted: 16 September 2015 at 16:49
@Mikey2000: I have M4/3 to E-Mount adapter from ebay. $10-15 USD free ship.

Picture is how pancake look like with adapter. Olympus and Minolta has used with M4/3 to E-mount adapter.

leitz Elmar 50/3.5 collapsed

Industar 50 collapsed

Industar 69

Olympus Lens Cap Lens 15/8

Nikon Ai-s SE 50/1.8

Canon EF 40/2.8

Minolta MD 45/2
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nandbytes View Drop Down
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Posts: 3630 		Post Options Post Options   Quote nandbytes Quote  Post ReplyReply Direct Link To This Post Posted: 16 September 2015 at 17:14
i guess pinhole it is then

I ended up ordering a new pair of shoes instead of the lens, since I don't have single pair that is capable of keep my feet dry for more than 10 feet. considering the country I live that's rather inconvenient
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