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02-19-2016, 01:50 AM - 1 Like   #31
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QuoteOriginally posted by 99exposures Quote
Will the pentax da★300mm f4 ed work with k1 in aps c mode?
.
Even better for you, 99exposures, it works in full frame.

02-19-2016, 09:15 AM   #32
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QuoteOriginally posted by clackers Quote
Even better for you, 99exposures, it works in full frame.
Sweet! Wait, with vignetting I suppose?
02-19-2016, 09:29 AM   #33
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QuoteOriginally posted by 99exposures Quote
Sweet! Wait, with vignetting I suppose?
No, it is a FF design per Ricoh's released lens compatibility list.
02-19-2016, 09:42 AM   #34
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QuoteOriginally posted by clackers Quote
Losing 50 percent of your pixels is a big hit, Rob.

Some would say you just spent $1800 on PQ your K5-IIS could have done! Something to use as a last resort, IMHO.

I override the Auto Crop on my Sony A7 if I know the APS-C lens covers more than the standard crop, which I'm happy to do myself in post.

You'll find DA lenses like the DA35, DA50 and DA70 are just fine.

I have two beautiful zooms - the Sigma 17-50 f2.8 and the DA*50-135 f2.8 that I won't even try to put on FF. I use the Tamron 28-75 f2.8 and 70-200 f2.8 instead.
I am aware of the sensor difference.

But I still have the question. And that is indeed the dilemma: would it be worth using the K-1 or would even the K-50 do? Or maybe even a M43 body? probably more an issue for long lenses I'd expect. And even if they fill the sensor, some lenses are rather crappy at the edges, although in other situations that might be desirable.

Which brings me to another question: I've seen pictures of the "crop" view in the K-1 viewfinder (and I assume live view is the same). Does the camera only crop JPEG? I would assume if you're using DNG it would always produce uncropped images, but I've already been wrong and may be wrong on this too. I ask cuz I wonder if the camera does anything but crop, like use some of the "extra" image it sees outside the crop for exposure, etc.

02-19-2016, 09:50 AM   #35
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QuoteOriginally posted by filoxophy Quote
No, it is a FF design per Ricoh's released lens compatibility list.
oh i got confused by adorama. yesterday adorama's website put "not compatible with ff" on the da*300mm.
02-19-2016, 09:51 AM - 1 Like   #36
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QuoteOriginally posted by 99exposures Quote
Sweet! Wait, with vignetting I suppose?
smc DA* 300mm "f/4.0" - Search Results - PentaxForums.com

Unfortunately, the links to the photos are dead. Reports vignetting at F4, but I dunno whether that would be true on the K-1.
02-19-2016, 11:05 AM - 1 Like   #37
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Some test photos for the DA*300mm can be found here:

DA* 300mm f/4 on Z-1p

He notes the lens hood as a possible cause for the vignetting at f/4. It definitely covers the full frame.
02-19-2016, 11:20 AM - 1 Like   #38
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The Pentax DA*300 at F4 used on a Canon 5DIII (quick test handheld):



02-20-2016, 07:36 AM   #39
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"Coming Soon"

hmmmmmmm. That could mean today or on launch day (at the end of April) or several months after that or several years after that or..

I hope they (or someone else) does a test site where they have each lens in the same setting, shot with each different aperture from max to around f/8 that can be cycled through a drop down box. That would be spiffy.
02-20-2016, 02:26 PM   #40
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have seen comments on other forums that the K1 will out resolve old lenses. Is that a reality ?
I can imagine chromatic issues could effect resolution. Is it down to the pixel density ?
Are they more tightly packed than my K-5iis ?
02-20-2016, 02:35 PM   #41
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QuoteOriginally posted by Transit Quote
have seen comments on other forums that the K1 will out resolve old lenses. Is that a reality ?
I can imagine chromatic issues could effect resolution. Is it down to the pixel density ?
Are they more tightly packed than my K-5iis ?
Ignore them. It's the same density as your K-5iis.
02-20-2016, 02:41 PM   #42
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QuoteOriginally posted by clackers Quote
Ignore them. It's the same density as your K-5iis.
goodoh thanks
02-20-2016, 02:55 PM   #43
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I can show you almost as bad vignetting on my 18-135 , maybe it's really a 4/3 lens.
02-20-2016, 09:50 PM   #44
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QuoteOriginally posted by Oakland Rob Quote
I'm still sorta confused about which lenses will work in FF glory on the K-1.
I have compiled a list of FF lenses that are in current lens manufacturers catalogues.
02-20-2016, 09:57 PM   #45
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QuoteOriginally posted by Transit Quote
have seen comments on other forums that the K1 will out resolve old lenses.
The K-1 does not challenge lenses anymore than a 16MP APS-C camera.

As a matter of fact, if you consider the same output size (say 8x10) then the K-1 will make one and the same lens look better. This argument is not considering equivalent images, i.e., obviously a lens like the FA 50/1.4 will have a wide angle of view on the K-1, but if you just consider the image sharpness (ignoring what is included) the lower enlargement factor of the K-1 will produce the better image.

Needless to say that a K-3 (II) with its 24MP pixels does stress lens more than the K-1. But even 24MP are not enough to outresolve a decent lens, as old as the latter may be.
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