Forgot Password
Pentax Camera Forums Home
 

Reply
Show Printable Version Search this Thread
05-20-2011, 04:13 PM   #241
Pentaxian
Ratmagiclady's Avatar

Join Date: Nov 2008
Location: GA
Photos: Gallery | Albums
Posts: 13,464
QuoteOriginally posted by jstevewhite Quote
So based on the recommendation in another thread of this forum, I ordered a 1.36X viewfinder magnifier. I'll report back on it
Oh, a KPS? They're *brilliant.* I keep forgetting they aren't part of the camera.

As for diffraction at like F22, ...I don't usually stop down so much, except on my old Kodak Signet where I love the effect. (As I discovered, since the shutter only goes to 1/300 and that perhaps a little stickily) It's not for measurebators in small formats, but to be honest, I think it manages to capture something of how really bright days *feel* to my sun-sensitive self, if not actually look. (Well, sometimes it looks like Kodachrome two stops over, but that's not very pretty anyway. )

Also, for understandable reasons, I love a nice eyecup, so you're in for a treat.


Last edited by Ratmagiclady; 05-20-2011 at 04:23 PM.
05-20-2011, 04:29 PM   #242
Veteran Member




Join Date: Mar 2009
Location: Midwest
Photos: Gallery
Posts: 1,407
QuoteOriginally posted by Ratmagiclady Quote
Oh, a KPS? They're *brilliant.* I keep forgetting they aren't part of the camera.

As for diffraction at like F22, ...I don't usually stop down so much, except on my old Kodak Signet where I love the effect. (As I discovered, since the shutter only goes to 1/300 and that perhaps a little stickily) It's not for measurebators in small formats, but to be honest, I think it manages to capture something of how really bright days *feel* to my sun-sensitive self, if not actually look. (Well, sometimes it looks like Kodachrome two stops over, but that's not very pretty anyway. )

Also, for understandable reasons, I love a nice eyecup, so you're in for a treat.
Actually the Tenpa. Seems similar?

I don't usually use f/22, and with focus stacking nowadays, there's no reason to do so on a landscape shot. I was just illustrating that it's not as dire as it was made to sound is all.

I try to avoid un-sunglassed exposure to midwestern sunshine. I end up squinting and grimacing, and when I come back inside, everything is blurry for a while.

And I *hate* presbyopia.
05-20-2011, 04:34 PM   #243
Pentaxian
Ratmagiclady's Avatar

Join Date: Nov 2008
Location: GA
Photos: Gallery | Albums
Posts: 13,464
QuoteOriginally posted by jstevewhite Quote
Actually the Tenpa. Seems similar?

By all reports we have, yes, different mounting, but otherwise probably just equivalent.

QuoteQuote:
I don't usually use f/22, and with focus stacking nowadays, there's no reason to do so on a landscape shot. I was just illustrating that it's not as dire as it was made to sound is all.

It's so. Also I think it may lose both sharpness and charm with more modern lens coatings, anyway.

QuoteQuote:
I try to avoid un-sunglassed exposure to midwestern sunshine. I end up squinting and grimacing, and when I come back inside, everything is blurry for a while.

And I *hate* presbyopia.
Some days around here as well as when I was back in the Upper Midwest, I'd call 'Sunny 22 days,' Sunny 16 and reflections off the ground. Render me efffectively Morocco Mole.
05-20-2011, 04:39 PM   #244
Veteran Member




Join Date: Mar 2009
Location: Midwest
Photos: Gallery
Posts: 1,407
QuoteOriginally posted by Ratmagiclady Quote
Some days around here as well as when I was back in the Upper Midwest, I'd call 'Sunny 22 days,' Sunny 16 and reflections off the ground. Render me efffectively Morocco Mole.
OMG-ROFL... So Google sent me one of the all-black unmarked CR-48 Google laptops for testing their ChromeOS, and I jokingly named it my "Secret Squirrel" laptop - and NOBODY knew what the hell I was talking about. Thanks for making me feel validated. Heeh!

05-20-2011, 04:53 PM   #245
Pentaxian
Ratmagiclady's Avatar

Join Date: Nov 2008
Location: GA
Photos: Gallery | Albums
Posts: 13,464
QuoteOriginally posted by jstevewhite Quote
OMG-ROFL... So Google sent me one of the all-black unmarked CR-48 Google laptops for testing their ChromeOS, and I jokingly named it my "Secret Squirrel" laptop - and NOBODY knew what the hell I was talking about. Thanks for making me feel validated. Heeh!
Whahappened!
05-20-2011, 05:50 PM   #246
Veteran Member




Join Date: Mar 2009
Location: Midwest
Photos: Gallery
Posts: 1,407
QuoteOriginally posted by jsherman999 Quote
.


For a brief second I thought you were using one of my old Tak 35 shots as an example somehow - looks similar, down to the same position of trellis


We have one that's sorta that color in the front yard; just got beaten down by the rain, though. Has those same little nymphs on it, too; I need to look 'em up again, I forgot what they turn into when they grow up. (Sigma 10-20)


05-20-2011, 06:43 PM   #247
Veteran Member




Join Date: Mar 2009
Location: Midwest
Photos: Gallery
Posts: 1,407
QuoteOriginally posted by jsherman999 Quote
.
For a brief second I thought you were using one of my old Tak 35 shots as an example somehow - looks similar, down to the same position of trellis
Here's a better stitched portrait example (in re our earlier discussion). 18-20 images shot in about thirty seconds, with four minutes spent stitching. Still lots more work than a single shot of ~85 f1.4 on FF, but it's also 100MP(!!!!). Again, no rebuttal, just "another way to get the same effect without looking cheesily pshopped"

She was smiling, at least, and I did some PP, so it's not so dull and lifeless as the last one:

05-21-2011, 10:53 AM   #248
Pentaxian
Marc Sabatella's Avatar

Join Date: Sep 2006
Location: Denver, CO
Photos: Gallery
Posts: 10,686
QuoteOriginally posted by jstevewhite Quote
The f/22 image is CERTAINLY less sharp than the 5.6 image, but it's very close to this f2.8 image. Both are FAR down from the lens peak between 5.6 and 8, but still useful. Here is the f/22 image, uncropped. I think even Marc might agree that it's pretty far from "destroyed" by diffraction
Yes, I admit that was hyperbole. I'm still have some intellectual curiosity about whether the DOF in that f/22 shot is *actually* greater than in an f/16 shot - that is, whether the points just outside the zone of acceptable sharpness according to a DOF formula on the f/16 shot actually turn out to be less sharp than the same points in the f/22 shot, or whether diffraction negated that advantage. I'd also be curious to see the distribution of sharpness - the f/16 shot would be sharper in the center than the f/22 shot because of diffraction, and for some zone expanding outward from there. At some point, the greater theoretical DOF at f/22 would overcome the diffraction effect, but it's not clear to me where that would happen.

05-21-2011, 10:59 AM   #249
Pentaxian
Marc Sabatella's Avatar

Join Date: Sep 2006
Location: Denver, CO
Photos: Gallery
Posts: 10,686
QuoteOriginally posted by jstevewhite Quote
As it stands, the only thing I think we're still disagreeing on is the DOF on the hyperfocal end of the spectrum, right?
Correct. And I actually am not disagreeing with anyone; I simply don't *know*, as I have read conflicting information on this. Some sample shots would be enlightening.

QuoteQuote:
I don't agree that you get MORE DOF at the hyperfocal end unless you change lenses and FOV (swap&crop, etc), or allow the FF lens to stop down farther (which seems hardly fair as you won't let the APS-c lens open up farther).
It's not a question of whether I "allow" the APS-C lens to open up further - it either does or it doesn't. But to the extent that no one cares about the other end of the aperture scale, you can "always" stop down more - except of course, when you can't. I don't think anyone would ever have claimed the FF camera could get more (deeper) DOF than APS-C - just that it can *match* the APS-C by stopping down for as long as one would normally care to. but in the cases where one cares to stp down more than one would normally, indeed, FF wouldn't be able to catch up unless the longer focal length required on FF to provide the same FOV meant the lens designer also choose to let the aperture close down farther.
05-21-2011, 01:52 PM   #250
Veteran Member




Join Date: Mar 2009
Location: Midwest
Photos: Gallery
Posts: 1,407
QuoteOriginally posted by Marc Sabatella Quote
Yes, I admit that was hyperbole. I'm still have some intellectual curiosity about whether the DOF in that f/22 shot is *actually* greater than in an f/16 shot - that is, whether the points just outside the zone of acceptable sharpness according to a DOF formula on the f/16 shot actually turn out to be less sharp than the same points in the f/22 shot, or whether diffraction negated that advantage. I'd also be curious to see the distribution of sharpness - the f/16 shot would be sharper in the center than the f/22 shot because of diffraction, and for some zone expanding outward from there. At some point, the greater theoretical DOF at f/22 would overcome the diffraction effect, but it's not clear to me where that would happen.
Ooh, I see what you mean. Interesting question... I'll have to look into that.
Reply

Bookmarks
  • Submit Thread to Facebook Facebook
  • Submit Thread to Twitter Twitter
  • Submit Thread to Digg Digg
Tags - Make this thread easier to find by adding keywords to it!
camera, dslr, ff, people, photography
Thread Tools Search this Thread
Search this Thread:

Advanced Search


Similar Threads
Thread Thread Starter Forum Replies Last Post
Buying locally, when you can. The advantage. Ed n Georgia General Talk 2 10-26-2010 07:55 AM
Advantage of mixed system yusuf Pentax DSLR Discussion 10 10-05-2010 07:07 AM
One EVIL/MILC/etc advantage Eruditass Non-Pentax Cameras: Canon, Nikon, etc. 21 06-07-2010 05:14 AM
OK...admit it, who stayed up until Midnight to peek for Pentax Goodies... brecklundin Photographic Technique 16 12-29-2009 08:23 PM
PopPhoto admit using K10D AF speed data in K20D review Peter Fang Pentax News and Rumors 31 02-24-2008 04:48 PM



All times are GMT -7. The time now is 05:39 AM. | See also: NikonForums.com, part of our network of photo forums!
  • Red (Default)
  • Green
  • Gray
  • Dark
  • Dark Yellow
  • Dark Blue
  • Old Red
  • Old Green
  • Old Gray
  • Dial-Up Style
Hello! It's great to see you back on the forum! Have you considered joining the community?
register
Creating a FREE ACCOUNT takes under a minute, removes ads, and lets you post! [Dismiss]
Top