Originally posted by Ben_Edict Richard, I would like to extend the discussion a bit, because I am also looking for a decent 300mm lens. I currently have the old K 300/4 (which I am going to sell) and the A* 300/4 and a Tamron 300/2.8 (the older 060B). I love the A*, because it is incredibly compact. The Tamron is simply fast – I won't get rid of it –, but I would like to have an AF lens, too as I now experience, that the K20's AF is good enough for birds and other small targets. So there is the new DA 300 and there are the old F/FA 300 mm lenses, which are 1/2 f-stop slower. As you have those and had the opportunity to use the DA: Which is the better lens? I like the possibility to use the F/FA (due to its aperture ring) with my old film cameras. But the DA seems to be more compact and has that 1/2 f-stop advantage and the very silent SDM drive. Given these different strengthes, the decision comes down to image quality. Did you notice any difference at all?
Thanks,
Ben
The A* is outstandingly compact and a wonderful lens, but it's close focussing distance of 3m and the lack of AF were my reasons for buying the FA*300 f4.5, plus I was able to find a brand new one at a clearance price (stupid dealer!)
Originally posted by Eaglerapids Ben, excellent question, and I await Richards answer, also. I had the same concern between the F*, FA*, and DA* 300mm's.
But what drove me to the DA* was it's features for not much more money that the used F-FA*'s. And I'm very very happy with my choice now that I've had time to use the DA*. I can't imagine it's IQ being beaten by any of the aforementioned lenses and if they can beat it, I still wouldn't trade, it's just simply an incredible lens. Well, come to think of it, there is a problem, it's stuck to my camera!
The FA*300 f4.5 is 1/3 stop slower but to my mind that's almost an insignificance.
I haven't both lenses to hand to do a direct comparison between the FA* and DA*, the only person I know that has both is Lance Blackburn in Oz. He says he cannot see much to choose between them, they are both superb!
Anyway, here is a brief outline of the salient differences as I see them, FA* first, then DA*:
F4.5 v. f4.0 (1/3 stop)
Aperture ring v. no aperture ring
Silver painted metal (more easily marked) v. black composite
No trpod mount v. removable tripod mount
67mm v. 77mm filter size
160mm x 73mm/935 grams v. 184mm x 83mm/1070 grams
2m close focus v. 1.4m
Screw AF v. SDM + screw AF
As far as the Sigma 100-300 EX is concerned, it just isn't in the same league at all, plus it's size and weight rule it out for me - 227mm x 94mm/1440 grams and 82mm filter. The hood is also bigger than the DA*300 hood.
Here is a comparison in sizes between it and a Tokina 80-400 and A*300. Apologies for the image quality, taken with my phone camera!
100-300 EX mounted on the istD
I'm waiting to see how well the DA*60-250 f4.0 performs, as that is for me a more attractive lens than the Sigma 100-300 EX.