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02-29-2016, 06:27 AM   #706
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Anyway, thanks again for sharing

02-29-2016, 08:43 AM   #707
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Please could someone tell me what is the minimum lens aperture for autofocus with k1? I have a K3 and a SMCP-DA* 300mm f/4. I am a photographer of nature (photos of birds) and need to know that. I intend to buy a k1 as soon as possible. Thank you guys
02-29-2016, 08:57 AM   #708
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IIRC it is 8 (not sure). But the DA*300 f/4 will have no problem to autofocus, of course!
On a K3 I can autofocus with no problem with the 300 + 1.4TC (so, f/5.6), but also with the 150-450 + 1.4TC (so, f/8).
02-29-2016, 10:59 AM   #709
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QuoteOriginally posted by Alvaro Fraga Quote
Please could someone tell me what is the minimum lens aperture for autofocus with k1? I have a K3 and a SMCP-DA* 300mm f/4. I am a photographer of nature (photos of birds) and need to know that. I intend to buy a k1 as soon as possible. Thank you guys
FWIW, I will keep my K3 for wildlife shooting, just because of its apparent larger reach.

02-29-2016, 11:27 AM - 1 Like   #710
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QuoteOriginally posted by Alvaro Fraga Quote
Please could someone tell me what is the minimum lens aperture for autofocus with k1? I have a K3 and a SMCP-DA* 300mm f/4. I am a photographer of nature (photos of birds) and need to know that. I intend to buy a k1 as soon as possible. Thank you guys
Normal AF point are given for f/5.6... That's why most AF lenses are no slower than f/5.6, or not much slower (f.5.8, f/6.3). Now there special AF points that are more precise for lenses with large max apperture or AF points that are made to track narrow apperture lenses (f/8) in general to adapt to long tele with a TC attached.

From K5-II, Pentax bodies have some AF point optimized for f/2.8, but up to my knowledge, Pentax bodies still don't have f/8 AF points. So you should consider f/5.6 the limit.

DA*300 is f/4 wide open and f/5.6 with an 1.4TC, in both cases, AF will be no issue.
02-29-2016, 07:48 PM   #711
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will it come any quicker if I throw an additional pile of cash onto my display?
02-29-2016, 07:58 PM - 1 Like   #712
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QuoteOriginally posted by Nicolas06 Quote
Pentax bodies still don't have f/8 AF points
As I said, the 150-450 + TC (f/8) on K3 focuses without any problem.
02-29-2016, 10:31 PM   #713
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QuoteOriginally posted by Pepe Guitarra Quote
FWIW, I will keep my K3 for wildlife shooting, just because of its apparent larger reach.
Would "crop mode" not be an adequate substitute for you?

02-29-2016, 11:35 PM   #714
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With 50% additionnal pixels...
02-29-2016, 11:51 PM   #715
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QuoteOriginally posted by reh321 Quote
Would "crop mode" not be an adequate substitute for you?
It could. I just need to try the K1 to see how the crop mode work.
03-01-2016, 12:50 AM   #716
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QuoteOriginally posted by timautin Quote
As I said, the 150-450 + TC (f/8) on K3 focuses without any problem.
That's interresting as for me the AF is not specified (publicly at least) for that.

Questionwould be if it focus well and fast then in all lighting conditions as there was no TC?
03-01-2016, 03:15 AM   #717
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QuoteOriginally posted by Nicolas06 Quote
.

Questionwould be if it focus well and fast then in all lighting conditions as there was no TC?
I doubt it.

The Pentax ones are rated to f5.6 and would be interested to know which others might be better.
03-01-2016, 04:27 AM   #718
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QuoteOriginally posted by Nicolas06 Quote
Questionwould be if it focus well and fast then in all lighting conditions as there was no TC?
I don't remember, I don't like the IQ with my TC, so I didn't tested a lot (but it was fun to be at 450*1.4*1.5 = 945mm !)
03-03-2016, 06:27 AM - 3 Likes   #719
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New impressions article on the K-1 site
Impressions | PENTAX K-1 Special site | RICOH IMAGING
03-03-2016, 10:09 AM   #720
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QuoteOriginally posted by D1N0 Quote
New impressions article on the K-1 site
Impressions | PENTAX K-1 Special site | RICOH IMAGING
Nice. K-1 visits Turkey.

But bad news for 645Z sales.

QuoteQuote:
Because the PENTAX K-1 provides me with such marvelous image quality, it makes it rather difficult for me to decide when to use the PENTAX 645Z in the future.
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