Forgot Password
Pentax Camera Forums Home

Show Printable Version Search this Thread
05-03-2015, 10:22 PM   #1
Forum Member

Join Date: Feb 2015
Posts: 96
Full Frame Lenses

I have the 31mm and the DFA 100mm macro - with the full frame coming out, I'm considering the 43mm to give me a semi wide angle, normal and a telephoto/macro option - What are your thoughts?

05-03-2015, 10:33 PM   #2
Site Supporter
Site Supporter
jimr-pdx's Avatar

Join Date: May 2010
Location: 1hr north of PDX
Photos: Gallery | Albums
Posts: 3,784
Personally I would try a more even split, like the DA*55 between the two. Or plan to add 43 and 77 both to the mix! Totally your preference though, perhaps you tend to lean to wider shots and the 31-43 spacing is just right.

Last edited by jimr-pdx; 05-03-2015 at 10:38 PM.
05-03-2015, 10:55 PM   #3
Forum Member

Join Date: Feb 2015
Posts: 96
Original Poster
Thanks jimr-pdx - curious about the da*55mm and potential vignetting on full frame
05-03-2015, 10:57 PM   #4
Veteran Member
Bob from Aus's Avatar

Join Date: Jul 2011
Location: Australia
Photos: Gallery
Posts: 1,094
I didn't get the 43 because the reviews using APC cameras was ordinary. Maybe wait until you have your FF in the hand and others can review the 43's performance on a FF. I had the same dilemma until they announced the K3 II. Looks like I will get the new K3 instead and dream about the FF with my 31mm a while longer.

05-03-2015, 11:43 PM   #5
Veteran Member
EarlVonTapia's Avatar

Join Date: Oct 2012
Location: Vancouver
Photos: Gallery
Posts: 1,207
QuoteOriginally posted by sumitkar1971 Quote
I have the 31mm and the DFA 100mm macro - with the full frame coming out, I'm considering the 43mm to give me a semi wide angle, normal and a telephoto/macro option - What are your thoughts?
28-31mm are my favorite focal lengths for "normal" primes on APSC. These lengths translate into 42-46.5mm on FF.

To me the FA 43 would be a smashing prime on the upcoming FF.

Get it now before the prices jump even higher!
05-03-2015, 11:50 PM   #6
Site Supporter
Site Supporter
pixie's Avatar

Join Date: Sep 2012
Location: Visitacion Valley, CA
Photos: Gallery | Albums
Posts: 825
QuoteOriginally posted by Bob from Aus Quote
dream about the FF with my 31mm
That's my fantasy, too.
05-04-2015, 01:11 AM   #7
Senior Member

Join Date: May 2012
Photos: Gallery
Posts: 208
Semiwideangel and full frame

Full frame has a sensor that is 24x36 mm large, like the 135-film. That means that the diagonal is 43 mm. So that lens gives you the same perspective as your eyes, and is the reason why they made such an odd lens. Under 43 is strictly wideangel, above is tele lens.
05-04-2015, 04:10 AM   #8
Billk's Avatar

Join Date: Jun 2012
Location: Melbourne, Victoria
Posts: 335
I have the 43mm (on a K7) and really like it. Once I get my FF I'm sure i will like it even more.

05-04-2015, 04:21 AM   #9
Veteran Member

Join Date: Sep 2013
Location: Sydney
Photos: Albums
Posts: 844
The 43mm is seriously underrated. The 31 and 77 steal the show, but the 43mm is still a magical lens. If you prefer a smoother bokeh, then the DA 55 may be a better option. If you like lenses with character, then get the 43.
05-04-2015, 05:08 AM   #10
Senior Member

Join Date: Jan 2011
Location: Sao Paulo
Photos: Albums
Posts: 127
I recently shoot a roll of film on a K1000 with a mix of lenses, being the 31mm one of then and, despite it is a wide lens, it fits very well on a FF body. I liked the results, although the focus screen of mine K1000 is a little miscalibrated.
Field of view, bokeh, sharpness and "the look" are very pleasing, to my liking. I'm eagerly waiting to see it in a Pentax FF DSLR
05-04-2015, 07:09 AM   #11

Join Date: Oct 2009
Location: North
Photos: Gallery
Posts: 4,385
Its more of a personal usage decision.
You need to try or know if you like the 43mm FOV.

I liked the 43ltd on aps-c very much.
On FF, I needed to "re-learn" its use.

I would suggest just looking at a 50mm as well.
If you want the shallow DOF 'look', the 50mm does it better.
The 43ltd somehow does not seem to do it as well. (due to FL, f-stop, working distance perhaps) .

On the note about performance.
I don't know where that ding against it on apsc comes from.
Its certainly one of the sharpest lenses I've got, getting very sharp from f2.8 onwards.
Certainly no problems on FF too. (proven with use on A7 and not just speculation )

I wrote about some user impression here :
A week with ...... (random ramblings of a lens junkie) - Page 2
05-04-2015, 07:44 AM   #12
Veteran Member

Join Date: Feb 2011
Posts: 4,873
QuoteOriginally posted by sumitkar1971 Quote
Thanks jimr-pdx - curious about the da*55mm and potential vignetting on full frame
For all intents, it's a full frame lens. It will vignette at F/1.4, but like a normal ff lens does.

Personally I would go with the 43 myself.
05-04-2015, 11:28 AM   #13
Forum Member
chti's Avatar

Join Date: Nov 2013
Location: Berlin
Posts: 62
I have the 3 FAs: 31/43/77. I can recommend all of them and Im really looking forward to use them on FF.
The one I use the most on APSC is the FA 43, especially for portraits along with the FA 77. The 43 is sharp wide open, tack sharp at f2.8. Im curious to see how the field of view will be on FF. Guess its gonna be a great "normal", small and light-weight lens.
05-04-2015, 01:34 PM   #14
Senior Member
Enrique S Toso's Avatar

Join Date: Jan 2014
Location: Mendoza - Argentina
Posts: 132
I believe that the FA 50mm F1.4 will be amazing in the FF body. Maybe just a little CA full stoped, but a sharpness beast in F4. Same the tamron 70-200 F2.8. The 3 amigos are amazing even in a pinhole camera made with a shoebox, lol.

Im afraid there is a lack of normal f2.8 zoom options in the legacy lenses.
05-08-2015, 10:39 AM   #15
Loyal Site Supporter
Loyal Site Supporter
monochrome's Avatar

Join Date: Mar 2008
Location: Working From Home
Photos: Gallery | Albums
Posts: 26,233
I'm traveling to 'old money' Florida next month. My travel bag will have the K-3, the three Princesses - and an MZ-S in a side pocket.

LBA aside, I really don't think I need any other gear.

Results from the MZ-S will tell me whether I 'need' the FF.

  • 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!
24x36mm, frame, full-frame, pentax, pentax full frame lenses
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
Full frame lenses on Crop bodies? marmitse General Photography 10 02-02-2015 07:22 PM
If Pentax went Full-Frame would my APC Lenses work? mdshooting Pentax Full Frame 15 12-06-2014 09:54 PM
DA lenses on Full Frame hjoseph7 Pentax SLR Lens Discussion 6 12-03-2014 01:14 PM
Samyang says five of its full frame lenses now available in Sony E mount jogiba Non-Pentax Cameras: Canon, Nikon, etc. 9 12-21-2013 06:10 AM

All times are GMT -7. The time now is 04:22 AM. | See also:, 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?
Creating a FREE ACCOUNT takes under a minute, removes ads, and lets you post! [Dismiss]