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10-08-2016, 11:41 AM   #1
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K1 EFCS improves sharpness

Today I was out and about experimenting long shots with the DFA150-450 @ 450, with and without electronics shutter. Surprisingly, I was able to get very tack sharp crop when EFCS enabled, while I thought the DFA150-450 sharpness was falling off beyond 400mm. To me it looks like part of the increased sharpness of pixel shift is coming from using an electronic shutter instead of mechanical shutter. Advantage of EFCS, we get sharper images without the burden of pixel shifted raw conversion. I guess I'm going to use EFCS whenever I can. Have you experienced the same thing?

10-08-2016, 11:55 AM   #2
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Probably ensures the complete lack of shutter vibrations on the image. I don't think it specifically does anything to the image. Good to know though.
10-08-2016, 01:24 PM   #3
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QuoteOriginally posted by biz-engineer Quote
Today I was out and about experimenting long shots with the DFA150-450 @ 450, with and without electronics shutter. Surprisingly, I was able to get very tack sharp crop when EFCS enabled, while I thought the DFA150-450 sharpness was falling off beyond 400mm. To me it looks like part of the increased sharpness of pixel shift is coming from using an electronic shutter instead of mechanical shutter. Advantage of EFCS, we get sharper images without the burden of pixel shifted raw conversion. I guess I'm going to use EFCS whenever I can. Have you experienced the same thing?
I did some product photos with and without EFCS, and there was a difference there, too. Interesting theory on pixel shift.

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10-08-2016, 06:15 PM   #4
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I find no information on "EFCS" nor "electronics shutter" in my K1 manual. Could you illuminate?

10-08-2016, 07:52 PM   #5
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QuoteOriginally posted by WPRESTO Quote
Could you illuminate?
- Pentax K-1 web page addition

- Info included with the v1.3 firmware update
10-08-2016, 11:03 PM   #6
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QuoteOriginally posted by rawr Quote
- Pentax K-1 web page addition - Info included with the v1.3 firmware update
Thanks for pointing to the addendum.
10-09-2016, 03:23 AM   #7
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Thanks. As usual, shortly after posting the question I found the answer myself, but have not as yet installed v1.3 in my K1.
10-09-2016, 03:45 AM   #8
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be careful when shooting with EFCS in artificial light. Shutter speed up to 1/100 is OK, but starting from 1/125s the horizontal stripes appear in the pictures.

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