Forgot Password
Pentax Camera Forums Home
 

Reply
Show Printable Version Search this Thread
11 Likes  
DA lenses on Full Frame: Test Shots thread
Posted By: falconeye, 07-07-2008, 02:50 PM

Hi everybody,

I would like to open up a thread dedicated to one topic:

DA lens on Full Frame: a sticky test shots thread.

This thread shall be dedicated to test shots of a DA lens mounted to a full frame body (e.g., a film camera body). By test shot, I mean shots dedicated to evaluate the performance. Shots of ordinary subjects aren't suitable to this task, normally, and should not be posted. So, these are the rules:
  • K mount lens dedicated to the APS-C form factor is used.
  • Image is taken full frame 36mm x 24mm.
  • Lens hood was removed.
  • And ideally, no filter is mounted.
  • The aperture used is specified (note that film cameras don't record EXIF...).
  • Sample image shows the entire field of view.
  • Sample image(s) show(s) corner, border and center performance at 10MP-100% (multiple crops, or single not-resized image).
  • The subject is such that resolution and vignetting at the borders can be compared to the center.
The idea behind this thread is obvious: To compile enough data to assess the spectrum of available lenses for a forthcoming full frame DSLR in K mount.

#################################################

Table of results as obtained in this thread (updated regularly):
SMC Pentax-DA primes...
SMC Pentax-DA zooms...
Sigma K mount DC...
  • Sigma 18-200mm f/3.5-6.3 DC: -
  • Sigma 10-20mm f/4-5.6 DC: - (below 14mm, Gooshin)
  • ...
Tamron K mount Di-II...
  • ...
Overall rating scale:
+++: no significant difference between APS-C and FF corners
++: difference but usable at full aperture with a small loss in corner IQ only
+: usable staring at f/4~f/5.6, with no or a small loss in corner IQ only
o: usable at f/11 or with big loss in corner IQ only
-: not usable


Last edited by falconeye; 07-20-2016 at 02:57 AM. Reason: Result table updated
Views: 324,586
05-03-2016, 05:17 PM - 1 Like   #436
Senior Member
Mock's Avatar

Join Date: Feb 2009
Location: Edmonton
Photos: Gallery | Albums
Posts: 299
QuoteOriginally posted by gazonk Quote
Thanks for showing! I'm a bit surprised that the vignetting is strongest at the longest focal length. For the other focal lengths, it looks highly usable for any subject where a little vignetting doesn't matter (or is desirable).

Edit: I guess you didn't use the lens hood?
Now you've stumped me, I think I took the hood off, but I was all giddy-new-camera mode so I might have overlooked it. I think it's off, or else 60 would vignette a ton.

QuoteOriginally posted by topace Quote
The SR is created by moving the sensor around, including moving it further away from the center of the image, potentially making the corners both darker and less sharp.

An in-body SR camera quite naturally demands a bigger image, or conversely, an in-body SR camera will have worse corner performance.
Thank you! I was wondering why some of my shots with DA lenses seem to only have vignetting on one side (two corners). This might explain it.

SR was on for the shots above, by the way.

------------------------------------------------------------------------------------------
---------- Post added 05-03-2016 at 07:06 PM ----------

Okay, I'm going to introduce a scary topic that some users here may not be familiar with: Lens Shaving

Here is a shot from the DA 10-17 at 10mm. The flashlight illuminates the ridged built-in lens hood very clearly.



If you remove the hood, then you get a nice circular fisheye lens on the FF sensor.

There is a service in Germany that will cut the hood off for you (this link also shows examples of FF coverage): Shaved or original Tokina 10-17 mounted on a full-frame Canon 5D- Shaved Nikkor/Nikon 10.5mm Fisheye - Shaved Sigma 10mm Fisheye - Shaved Samyang 8mm Fisheye
or you can go the DIY route: Tokina 10-17 - DIY hood shaving -- Canon EF and EF-S Lenses in photography-on-the.net forums

Another interesting piece of information about the DA 10-17 comes at 14mm. It has been previously confirmed that the lens covers full-frame at this focal length, but it has another surprise. Look at these two images shot from a stationary tripod, SR off:





The top image is from the Pentax-F Fisheye 17-28mm at 17mm, it's widest setting. This lens is a 180 diagonal fisheye at 17mm, same as the 10-17 is to an APS-C camera at 10mm.
The bottom image comes from the DA 10-17 at 14mm! It has a dramatically larger field of view than the 17-28.

The difference even holds up when both lenses are focused to infinity. Anyone wanting an ultra-wide for their K-1 would do well to hold onto their 10-17.


Last edited by Mock; 05-03-2016 at 06:12 PM.
05-05-2016, 08:07 AM   #437
Site Supporter




Join Date: Jan 2010
Photos: Gallery
Posts: 506
QuoteOriginally posted by Mock Quote

Another interesting piece of information about the DA 10-17 comes at 14mm. It has been previously confirmed that the lens covers full-frame at this focal length, but it has another surprise. Look at these two images shot from a stationary tripod, SR off:





The top image is from the Pentax-F Fisheye 17-28mm at 17mm, it's widest setting. This lens is a 180 diagonal fisheye at 17mm, same as the 10-17 is to an APS-C camera at 10mm.
The bottom image comes from the DA 10-17 at 14mm! It has a dramatically larger field of view than the 17-28.

The difference even holds up when both lenses are focused to infinity. Anyone wanting an ultra-wide for their K-1 would do well to hold onto their 10-17.
Hi there,

Do you have any vignette when the lens is at 14mm?

For me, it seem that there seem to have some vignette, but sometime it's not as bad. weird.

My 2 shots.




Last one is with multi-exposure of K1 - 4 images.
05-05-2016, 02:09 PM   #438
Pentaxian




Join Date: Sep 2013
Location: Sydney
Photos: Albums
Posts: 843
I was impressed by my test shot using the sigma 8-16 a day or two ago, so took it out for a longer trip today. Short story: vignetting is obvious at 16mm. Sometimes, in some shots, it doesn't look bad. Most of the time it does....

On the plus side though, it's actually quite sharp on FF (compared to my other legacy ultra wide lenses). Another downside, is that you're limited to 16mm and f5.6.

05-06-2016, 06:58 AM   #439
Pentaxian
MJSfoto1956's Avatar

Join Date: Dec 2013
Location: Boston
Posts: 1,287
QuoteOriginally posted by Mock Quote
When I picked up my K-1 the other day I had a go with the shop's DA* 60-250 f/4, in FF mode naturally. These are straight out of camera, just resized on export from lightroom.
Seems like the DA* 60-250mm will be a good fit on the K-1 using 4x5 crop (see attached photo)

Note: a 4x5 crop of a full-frame image results in an approximate 1.14 crop factor.
Thus the 60-250mm cropped to 4:5 becomes an effective 68-285mm lens (or in very "round" numbers a 70-300mm f/4 lens).

Michael

Attached Images
 
05-06-2016, 12:46 PM   #440
Pentaxian
geomez's Avatar

Join Date: Mar 2013
Location: Preskitt Arizona
Photos: Gallery
Posts: 1,623
QuoteOriginally posted by MJSfoto1956 Quote
Seems like the DA* 60-250mm will be a good fit on the K-1 using 4x5 crop (see attached photo)

Note: a 4x5 crop of a full-frame image results in an approximate 1.14 crop factor.
Thus the 60-250mm cropped to 4:5 becomes an effective 68-285mm lens (or in very "round" numbers a 70-300mm f/4 lens).

Michael


Looks like there's still some vignetting within your crop frame.
05-06-2016, 12:55 PM   #441
Loyal Site Supporter
UncleVanya's Avatar

Join Date: Jul 2014
Photos: Gallery | Albums
Posts: 9,750
QuoteOriginally posted by MJSfoto1956 Quote
Seems like the DA* 60-250mm will be a good fit on the K-1 using 4x5 crop (see attached photo)

Note: a 4x5 crop of a full-frame image results in an approximate 1.14 crop factor.
Thus the 60-250mm cropped to 4:5 becomes an effective 68-285mm lens (or in very "round" numbers a 70-300mm f/4 lens).

Michael
With the hood or without?
05-06-2016, 01:52 PM   #442
Pentaxian
MJSfoto1956's Avatar

Join Date: Dec 2013
Location: Boston
Posts: 1,287
QuoteOriginally posted by geomez Quote
Looks like there's still some vignetting within your crop frame.
No doubt, as this was shot at f/4 so "some" vignetting is to be expected.
Just pointing out that this DA* lens will be "serviceable" on the K-1 while still providing high res: 24Mp (square), 24Mp (1.2x crop), and 30Mp (4:5 crop).

Michael
05-10-2016, 03:38 PM   #443
Pentaxian
ChristianRock's Avatar

Join Date: Jul 2013
Location: Marietta, GA
Photos: Gallery | Albums
Posts: 4,317
Anyone tried the DA 35 2.4 on the K-1 yet? I am sure it will be fine but I am curious about the corner resolution.

05-10-2016, 06:22 PM   #444
Loyal Site Supporter
clackers's Avatar

Join Date: Jul 2013
Location: Melbourne
Photos: Albums
Posts: 8,496
QuoteOriginally posted by ChristianRock Quote
Anyone tried the DA 35 2.4 on the K-1 yet? I am sure it will be fine but I am curious about the corner resolution.

Check the sticky at the top, CR:


"DA 35mm F2.4 AL: +++ (aurele ;like FA35/2.0 and no vignetting) (frank)"


I never noticed a problem when I played with it on the A7. It's virtually a daughter of that FA35.


For new K-1 owners who won't have spare cash for decades as a result, the DA35 and DA50 are the cheapest lenses to go with the system. For some, they won't need another lens. Others, a DA70 or 100 WR Macro could be added later, to get a three prime setup.


For someone with LBA, I suppose all these suggestions of how to do things in a measured, limited and cost effective way are quite alien.

Last edited by clackers; 05-10-2016 at 06:27 PM.
05-10-2016, 06:33 PM   #445
Site Supporter




Join Date: Jan 2010
Photos: Gallery
Posts: 506
QuoteOriginally posted by ChristianRock Quote
Anyone tried the DA 35 2.4 on the K-1 yet? I am sure it will be fine but I am curious about the corner resolution.
Did try the DA35 2.4 but on portrait.

Could refer to the below and open up the full size to have a look. Taken at F4.
https://www.flickr.com/photos/47967900@N08/26590856480/sizes/o/
05-10-2016, 07:57 PM   #446
Pentaxian
ChristianRock's Avatar

Join Date: Jul 2013
Location: Marietta, GA
Photos: Gallery | Albums
Posts: 4,317
QuoteOriginally posted by clackers Quote
Check the sticky at the top, CR:


"DA 35mm F2.4 AL: +++ (aurele ;like FA35/2.0 and no vignetting) (frank)"


I never noticed a problem when I played with it on the A7. It's virtually a daughter of that FA35.
I know it works on film and I've seen mixed reports from Sony users, which I think might be down to the adapters used. So I was specifically asking for K-1 users if they had used the lens.

QuoteOriginally posted by ranchy Quote
Did try the DA35 2.4 but on portrait.

Could refer to the below and open up the full size to have a look. Taken at F4.
https://www.flickr.com/photos/47967900@N08/26590856480/sizes/o/
That is a great portrait!
05-10-2016, 08:05 PM - 1 Like   #447
Loyal Site Supporter
clackers's Avatar

Join Date: Jul 2013
Location: Melbourne
Photos: Albums
Posts: 8,496
QuoteOriginally posted by ChristianRock Quote
I know it works on film and I've seen mixed reports from Sony users, which I think might be down to the adapters used.
But there's no adapter on film.

I own both the FA35 and DA35 and personally, I'd be hard pressed to tell apart shots taken with them.

Last edited by clackers; 05-10-2016 at 08:12 PM.
05-11-2016, 05:20 AM   #448
Pentaxian
ChristianRock's Avatar

Join Date: Jul 2013
Location: Marietta, GA
Photos: Gallery | Albums
Posts: 4,317
QuoteOriginally posted by clackers Quote
But there's no adapter on film.

I own both the FA35 and DA35 and personally, I'd be hard pressed to tell apart shots taken with them.
It's just a bit harder to judge border performance on film cameras and that is what I was particularly asking about. I do appreciate your comparison between the DA and the FA versions
05-11-2016, 05:39 PM   #449
Site Supporter




Join Date: Jan 2010
Photos: Gallery
Posts: 506
QuoteOriginally posted by ChristianRock Quote
I know it works on film and I've seen mixed reports from Sony users, which I think might be down to the adapters used. So I was specifically asking for K-1 users if they had used the lens.



That is a great portrait!
Thanks..

Anyway, i don't own a FA35 but a friend does use it for his landscape. He did say he like the lens alot.

An awesome image by him..

https://flic.kr/p/GKs1EH
05-12-2016, 07:12 PM   #450
Site Supporter
micromacro's Avatar

Join Date: Jan 2014
Location: Florida
Posts: 3,018
Here is DA 21ltd on K-1 at f3.2; the first picture is with the original lens hood, and the second's with the metal hood for SuperTak 35mm.

Both pictures were taken with the same settings, from exact same spot, and focusing at the same point.
Attached Images
   
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!
60-250mm, aperture, bodies, body, camera, corner, da, da*, da* 60-250mm, f2.8, f4, ff, film, flickr, focus, frame, k-mount, lens, lenses, op, pentax, pentax lens, pm, post, sdm, sensor, shots, slr lens, tests, thread
Thread Tools Search this Thread
Search this Thread:

Advanced Search


Similar Threads
Thread Thread Starter Forum Replies Last Post
DA Lenses on Full Frame (DA 35 ltd) Painter Pentax Full Frame 18 05-29-2016 04:42 PM
DA lenses on Full Frame hjoseph7 Pentax SLR Lens Discussion 6 12-03-2014 01:14 PM
TEST: smc PENTAX DA 35mm 2.8 Macro Limited on Full Frame vjacesslav Pentax SLR Lens Discussion 2 03-17-2012 06:41 AM
DA lenses on Full Frame: Test Shots falconeye Pentax Lens Articles 0 07-07-2008 02:50 PM
DA lenses on full frame sensor ZigDaPig Pentax DSLR Discussion 16 01-05-2008 11:22 AM



All times are GMT -7. The time now is 09:45 PM. | See also: NikonForums.com, CanonForums.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