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Samples: SMC Pentax-M 1:2.8 40mm

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Post Options Post Options   Quote Cucoo Quote  Post ReplyReply Direct Link To This Post Topic: Samples: SMC Pentax-M 1:2.8 40mm
    Posted: 11 February 2020 at 18:55
Samples: SMC Pentax-M 40mm F2.8

mount: Pentax K-mount
format: FF
year: 1976-1984
max aperture: 2.8
min aperture: 22
elements/group: 5/4
aperture blades: 5
min focus distance (mm): 600
filter diameter (mm): 49
length (mm): 18
weight (g): 110

additional information:
Smallest pancake of all the legacy pancakes and smallest SLR lens that Pentax ever produced.

This thread is open for C&C and for posting additional pictures. Please ONLY post pictures taken with the lens in the title- or start a new thread.
Please state camera, version of the lens and adapter in your post!

Edited by Micholand - 12 February 2020 at 18:29
 



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Cucoo View Drop Down
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Post Options Post Options   Quote Cucoo Quote  Post ReplyReply Direct Link To This Post Posted: 11 February 2020 at 19:11
First, the lens:





Pancakes - compared to Minolta 45mm on XD7



More pancakes, now joined by the Konica Hexanon AR 40mm. As you can see, with adapter they all are bigger (and also heavier) than the tiny Samyang AF 35mm. The flange distance of the K mount also means that it'll never be really tiny when adapted, just look at how long the adapter is.



On the Pentax ME on the other hand it really makes for one of the smallest SLR setups, it's really the size of a point & shoot.


Samples, all developed from RAW in darktable with my standard settings (that include sharpening):

Very nervous bokeh and background blur on medium distance demanding backgrounds:





Less demanding and longer distance looks better. The next photo also shows the very good ghosting control, you can catch tiny ghosts but even slight reframing usually helps.



Flaring is another issue and the 5 blades make for dull sunstars (f22):



Boring street shot for sharpness (f8). It was very windy, so it might be possible that the trees aren't as sharp as it gets, but I think it's satisfactory over the whole frame.



Edited by Cucoo - 11 February 2020 at 19:18
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QuietOC View Drop Down
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Post Options Post Options   Quote QuietOC Quote  Post ReplyReply Direct Link To This Post Posted: 11 February 2020 at 19:59
Originally posted by Cucoo Cucoo wrote:


additional information:
Smallest pancake of all the legacy pancakes and smallest SLR lens that Pentax ever produced.

The Pentax DA 40mm F2.8 XS is considerably smaller than the Pentax-M version.
Sony A7III A77II A6000 HVL-F45RM LA-EA3 LA-EA4 MB-IV MC-11 EF-E II MD-NEX KR-NEX DA-NEX
Minolta Maxxum 600si
Pentax Q7 5-15 15-45/2.8 8.5/1.9 11.5/9 AF-P/Q
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Post Options Post Options   Quote Cucoo Quote  Post ReplyReply Direct Link To This Post Posted: 11 February 2020 at 20:03
Right, I meant legacy pancake
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