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07-05-2014, 06:22 AM   #1
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Pentax Q to K adapter: Increased sharpness?

Just wondering if the genuine Pentax Q to K adapter with mechanical shutter offers improved sharpness over the cheaper adapters which only use electronic shutter. I'm talking about actual sharpness rather than the jello effect.

07-05-2014, 07:27 AM   #2
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The genuine adapter has better matte paint inside which allows less reflections, and so it can be a little better than an unaltered cheapo. However, there is no optical element in either one so there is no other effect on the optics either way. The cheapo models can be fairly easily improved with better paint or black felt.
07-05-2014, 07:59 AM   #3
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The jello effect can make things appear less sharp and therefor affect the perceived sharpness, but other than that no.
07-05-2014, 08:48 AM   #4
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QuoteOriginally posted by VisualDarkness Quote
The jello effect can make things appear less sharp and therefor affect the perceived sharpness, but other than that no.
That's what I was wondering about. Since the electronic shutter doesn't expose the entire image at the exact same instance, if perceived sharpness could be affected even if the jello effect wasn't readily apparent.

QuoteOriginally posted by vonBaloney Quote
The cheapo models can be fairly easily improved with better paint or black felt.
Yep. It was the first thing I did when I bought it.

07-05-2014, 11:05 AM   #5
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I believe that my images are sharper with the Pentax adapter, I tend to shoot hand held so I must always contend with some motion (me) during an exposure. Even if I shoot at 1/2000 sec the Electronic shutter will induce some misalignment between it's scans because of my movement during the sensor read and write time even considering that each line is exposed for 1/2000 sec. from what I understand the total image capture time is still 1/13 sec.
07-06-2014, 06:54 AM   #6
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QuoteOriginally posted by hnikesch Quote
I believe that my images are sharper with the Pentax adapter, I tend to shoot hand held so I must always contend with some motion (me) during an exposure. Even if I shoot at 1/2000 sec the Electronic shutter will induce some misalignment between it's scans because of my movement during the sensor read and write time even considering that each line is exposed for 1/2000 sec. from what I understand the total image capture time is still 1/13 sec.
Yep. This is the kind of thing I was thinking of. I shoot hand held a lot as well, and thought the genuine Pentax adapter might offer some advantage in this area for the reasons you just described. When I can afford it, that will probably be my next purchase.
07-14-2014, 10:00 AM   #7
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I have not seen a difference in adapter types for tripod shooting except for when the subject itself was moving due to wind or being alive.

I suck at handheld adapted work so I don't even bother, but I'm sure the differences will be pronounced.

The Pentax OEM adapter itself is such a well engineered piece it is just a joy to use so I would not want to go back to the other types, although they did the job fine when I used them.
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