Forgot Password
Pentax Camera Forums Home
 

Reply
Show Printable Version Search this Thread
08-18-2010, 12:42 PM   #16
Veteran Member




Join Date: Dec 2006
Location: Outside of Philly
Posts: 1,564
QuoteOriginally posted by Impartial Quote
What about the FA lenses on full-frame? I am not joking -- I know they cover the full image circle, but what degree of vignetting/light dropoff would you see, say, on an FA 28/2.8 or an FA 35/2? Has anyone looked at this in the systematic way they examined the DA lenses?
I'm sure MANY folks used FA lenses on film! :-)

08-19-2010, 05:11 PM   #17
Site Supporter
jpzk's Avatar

Join Date: Jan 2009
Location: Québec
Photos: Gallery | Albums
Posts: 7,256
Original Poster
QuoteOriginally posted by GeneV Quote
That is surprising and too bad. The Tammy macro was high on my list. This year I have stayed away from any lens lately that won't work reasonably well on my film bodies. (The one notable exception being the DA 12-24).
I was just as surprised as you were.
deadwolfbones down this thread is saying that he's sure at 99% that the Tamron macro is FF able, and egordon99 says that the Tammy 70-200 is also FF.

Now, what should I make out of all this?

On one thread (lens database here), we can see that both those lenses are reported as not-useable with FF.

JP
08-19-2010, 05:15 PM   #18
Site Supporter
jpzk's Avatar

Join Date: Jan 2009
Location: Québec
Photos: Gallery | Albums
Posts: 7,256
Original Poster
QuoteOriginally posted by deadwolfbones Quote
As I mentioned in an earlier post here, I am surprised now that it is FF.
And I can see now that the 70-200 is as well ...
JP
08-19-2010, 05:17 PM   #19
Site Supporter
jpzk's Avatar

Join Date: Jan 2009
Location: Québec
Photos: Gallery | Albums
Posts: 7,256
Original Poster
QuoteOriginally posted by jsherman999 Quote
I may be wrong, but I was pretty sure that Tamron 70-200 2.8 is a FF lens...

EDIT: Yes, it is FF-capable. link --> here.

.
So I see ! My copy is an "SP" type ... does that make any difference?
Thanks for the info.

JP

08-19-2010, 05:24 PM   #20
Site Supporter
Douglas_of_Sweden's Avatar

Join Date: Apr 2008
Location: Stockholm
Photos: Gallery
Posts: 3,353
QuoteOriginally posted by dgaies Quote
In addition to the DA*200 and 300, I believe the DA*60-250 would cover the entire size of a FF sensor (be it film or digital).

Was unaware the DA40 could do it, but to be honest I never thought about it since I have the 43 and not the 40.
The SMC Pentax-DA 40mm f2.8 limited (pancake) is based on the original pancake lens, the SMC Pentax-M 40mm f2.8. They just made a minor change on the last lens element and updated coatings...well, put in autofocus also. So sure, it is FF. 35mm film is FF. In practise.
08-19-2010, 05:36 PM   #21
Veteran Member




Join Date: Dec 2006
Location: Outside of Philly
Posts: 1,564
QuoteOriginally posted by jpzk Quote
Well, after reviewing the said thread on using DA lenses on FF cameras, I came upon two rather big surprises:
- Tamron Macro 90/2.8 Dii
- Tamron 70-200/2.8
(I own both)
would be un-useable on FF.
The rest of my lenses seem to be ready for eventual FF action, except for the DA*16-50/2.8; there wasn't much said on that one but I suppose it still would be useable to some extent.

JP
AF90mm F/2.8 Di 1:1 Macro; Lenses; Tamron USA, Inc.

AF70-200mm F/2.8 Di LD (IF) Macro; Tamron USA, Inc.

They has a Di in the name, so it's "digitally optimized" (regarding coating the rear element), but still FF compatible.


Dii are for crop only.
08-19-2010, 05:36 PM   #22
Veteran Member




Join Date: Dec 2006
Location: Outside of Philly
Posts: 1,564
QuoteOriginally posted by jpzk Quote
So I see ! My copy is an "SP" type ... does that make any difference?
Thanks for the info.

JP
If the lens has a "Di" on it, it's fine.
08-19-2010, 05:50 PM   #23
Senior Member




Join Date: May 2010
Photos: Gallery
Posts: 208
Just a comment on Douglas's post: I observe that the DA 40 is based on a FF formula, but in the thread referenced above on FF compatibility of DA lenses it is marked with one asterisk, indicating corner softness and vignetting wide open. I just wonder, if the same measurements were taken for the FA lenses, how many would be limited in Theriault "FF compatibility". Obviously they will have a full image frame, bug how many will show up with vignetting or corner softness?

08-20-2010, 05:11 AM   #24
Site Supporter
Douglas_of_Sweden's Avatar

Join Date: Apr 2008
Location: Stockholm
Photos: Gallery
Posts: 3,353
QuoteOriginally posted by Impartial Quote
Just a comment on Douglas's post: I observe that the DA 40 is based on a FF formula, but in the thread referenced above on FF compatibility of DA lenses it is marked with one asterisk, indicating corner softness and vignetting wide open. I just wonder, if the same measurements were taken for the FA lenses, how many would be limited in Theriault "FF compatibility". Obviously they will have a full image frame, bug how many will show up with vignetting or corner softness?
The SMC Pentax-M 40mm f2.8 pancake is also rather soft wide open and vignete somewhat if you shoot something like a homogeneously blue sky. Non the less it is a nice lens and made for 24x36mm film frames.

I don't know what they intended to do when they changed the last lens element slightly to make the DA40ltd out of the M40 pancake. They may have prioritised the part of the image circle that covers the APS-C format to improve sharpness there and then made the corners outside the APS-C somewhat worse. But to draw that conclusion you need to shoot both a DA40ltd and a M40 pancake side by side on full frame and compare. Just that the DA40ltd is soft wide open and vignete a little at f2.8 doesn't mean it can't be used as full frame. The same can be said about plenty of old lenses from the film days can be said to do the same. Stop down one step, and they worked fine. Shooting on the smaller APS-C format, especially with old film lenses, for a couple of years have made pentaxians somewhat spoiled in this regard.

Last edited by Douglas_of_Sweden; 08-20-2010 at 08:59 AM. Reason: unprecise english
08-20-2010, 08:32 AM   #25
Administrator
Site Webmaster
Adam's Avatar

Join Date: Sep 2006
Location: Arizona
Photos: Gallery | Albums
Posts: 43,126
Just check Pentax Lens Listings - Pentax Lens Review Database - every non-DA lens is full-frame compatible. The only exception within the DA series is the DA 40mm.
08-20-2010, 08:35 AM   #26
Veteran Member




Join Date: Sep 2007
Location: La Crescenta, CA
Posts: 7,452
QuoteOriginally posted by Adam Quote
The only exception within the DA series is the DA 40mm.
Not true, as noted upthread.
08-20-2010, 08:40 AM   #27
Administrator
Site Webmaster
Adam's Avatar

Join Date: Sep 2006
Location: Arizona
Photos: Gallery | Albums
Posts: 43,126
And btw- each category, when you click into it, has a description of that lens series.
08-23-2010, 08:28 AM   #28
Site Supporter
jpzk's Avatar

Join Date: Jan 2009
Location: Québec
Photos: Gallery | Albums
Posts: 7,256
Original Poster
QuoteOriginally posted by egordon99 Quote
If the lens has a "Di" on it, it's fine.
Thanks for the answer.
That means I am going to keep those Tammies for a while yet.
Cheers.

JP
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!
ff, k-mount, lenses, list, pentax, pentax ff, pentax lens, slr lens
Thread Tools Search this Thread
Search this Thread:

Advanced Search


Similar Threads
Thread Thread Starter Forum Replies Last Post
Is 645D compatible with Pentax 6x7 lenses ? Samsungian Pentax Medium Format 41 04-21-2010 12:53 PM
A growing list of Compatible lenses cupic Pentax SLR Lens Discussion 3 03-13-2010 01:49 AM
Compatible Lenses jct us101 Pentax DSLR Discussion 19 12-05-2008 05:51 PM
List of announcement dates for Pentax lenses and bodies clawhammer Pentax SLR Lens Discussion 5 07-27-2008 02:05 AM
Compatible lenses SherryM Pentax SLR Lens Discussion 9 04-29-2008 02:39 PM



All times are GMT -7. The time now is 08:00 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