Search results for 'back focus' - page 1052
Using a teleconverter
As an example Canon cameras are not able to AF with a teleconverter on any lens that takes it over f5.6 (or f8 on their pro range bodies).Therefore I can use my 1.4x TC on a Canon 70-200mm f4 (for instance) as this will take it to f5.6 but I cannot use the same lens with a 2x converter as it will ta...
Posted by Mike-P on 04/07/2012 - 18:45
Using a teleconverter
I have a Kenko x2 and it will only auto focus with Pentax lenses. Im not sure they are compatible with others, maybe be wrong though. It certainly doesnt with my Siggy lenses. Paul
Posted by paulgee20 on 05/07/2012 - 09:18
Recommendations for fast manual zoom?
I am looking for a fast (constant f2.8 ) manual focus zoom, and am wondering if anyone has any recommendations? Is there anything available somewhere around the range of say the DA* 50-135? It has to be f2.8, I have an SMC Pentax-A 35-105mm F3.5, which is a fantastic lens, but I would like an extra ...
Posted by aliengrove on 07/07/2012 - 06:02
Recommendations for fast manual zoom?
Sigma 70-200mm F2.8 EX DG OS HSM Lens?? Siggy Blurb: - This large aperture telephoto zoom lens, incorporating Sigma's original Optical Stabiliser function, covers focal lengths from 70mm to 200mm and offers a constant aperture of F2.8 over the entire zoom range. The OS function offers the ...
Posted by paulgee20 on 07/07/2012 - 10:28
Recommendations for fast manual zoom?
Tamron SP 80-200 f/2.8 Adaptall 2, model 30A? K. Tamron SP 80-200mm F/2.8 LD Model 30A: This is an absolutely superb optical design which features a three element focus group incorporating one low dispersion (LD) element, plus a five element variator group coupled with a three element compensa...
Posted by womble on 07/07/2012 - 10:54
Recommendations for fast manual zoom?
Are you selling the matched teleconvertors at the same time? Just the 1.4X-L, the buyer has a AF 1.7x so there is really no need for the 2X-L. I will sell that separately as I have nothing left that it will fit on if the 300mm goes. I couldn't imagine selling it if I ever managed to get one. ...
Posted by Mike-P on 19/07/2012 - 17:15
DA 14 f2.8, DA 15 f4 or something else?
For me it's an academic exercise at the moment but if you were in the market for a wide angle lens to fit a K-5 would you buy the DA14 f2.8, the DA15 f4 or something else? DA14 is 1 stop faster & is slightly wider. DA15 has better resolution figures, is smaller, lighter & cheaper. Or, given that...
Posted by wadna on 07/07/2012 - 06:47
DA 14 f2.8, DA 15 f4 or something else?
Thanks all. I'm surprised no-one has suggested a manual focus prime lens.
Posted by wadna on 08/07/2012 - 00:21
DA 14 f2.8, DA 15 f4 or something else?
I have a DA14 and love it to bits. The 2.8 is very handy for shallower DOF shots close up, and in fact has a closer focus distance. Can't comment on the DA15.
Posted by Smeggypants on 08/07/2012 - 00:47
DA 14 f2.8, DA 15 f4 or something else?
Thanks all. I'm surprised no-one has suggested a manual focus prime lens. There's always the Samyang 14mm f2.8, a big heavy chunk but it looks very sharp (plenty of distortion though).
Posted by Pentaxophile on 08/07/2012 - 22:48
M42 for Bellows
Yes, I was considering adapting that bit but will just use a short extension tube on the back of the bellows:D.
Posted by fatspider on 08/07/2012 - 18:17
M42 for Bellows
Thanks for the input folks, I think I'm going to try and find a 1.4 Tak, failing that it'll be a 1.8, I had a play about holding a K mount f2 in front of the bellows and I think I need as much light as possible which rules out the f2.8 Jena. You might be better with the 1.8. I know with the M serie...
Posted by womble on 09/07/2012 - 17:52
M42 for Bellows
Isn't the Bellows Takumar 100mm?? ..... bit long for bellows use . No it isn't. It is perfect for bellows. It makes it a lot easier for closeups. You have somewhat more light between the lens and the object compared to a 50mm lens. Also if you completle contract the bellows it will just work...
Posted by Horst on 11/07/2012 - 00:42
The FA 50 F1.4 and the K-5
I think you need to go back to the reviews of the K-5. Many of these listed PF as a problem in the pros and cons I'm surprised this hasn't been taken in :shock: "I still would like to see a firmware fix from Pentax regarding purple fringing, as it’s one big image quality concern for an othe...
Posted by Algernon on 09/07/2012 - 12:21
Anyone provide feedback on DA21mm vs DA 17-70?
My own experience with these lenses is similar to Jules. I have the 15, 21 and 17-70. The only advantages of the 21 over the 17-70 are size and it's not SDM so locks focus more consistently. I don't believe it's any sharper than the 17-70 and for colour rendering I like the 15mm best of the three. I...
Posted by smudge on 12/07/2012 - 09:22
WTB: Telephoto Lens.
You may be able to pick the old 80-320 up for around £100, apart from its tendency to hunt for focus it's a damn good lens for the money: Check my PPG, the black headed gull and the barbary ground squirrel were both shot with an 80-320
Posted by fatspider on 12/07/2012 - 23:41
WTB: Telephoto Lens.
Thankyou all! I was unsure whether to post the link, but i felt it was a good example. Ill keep my eyes open! and ill keep hunting down a good "bargain". i think im starting to sway back more to the prime lenses again. Just so i can expand my lens collection, and have some variance instead...
Posted by OJS on 13/07/2012 - 07:33
M42 Lenses in your collection
Used to have a decent selection of Takumars or M42s, 28 f/3.5, 35 f/3.5, 50 f/1.4, 55 f/1.8, 85 f/1.9, 85 f/1.8, Helios 4 f/2. Then I got the K series bug :) and now I only have the 55 and Helios still around. Build wise any Tak is amazing, the focus rings are amazingly tactile. Mi...
Posted by robbiec on 16/07/2012 - 16:26
M42 Lenses in your collection
Had a few, sold them all now hankering to get back into manuals, so at the moment all I have is; Helios 44-2 58mm f2 - cheap as chips but great lens Super Takumar 105mm f2.8 - not had chance to use it yet! but can't wait!
Posted by antihero on 25/07/2012 - 11:33
Looking for the right telephoto
On the back of promising myself more time off to do more wildlife photography, I plumped for the 50-500mm and ordered yesterday. Amazingly it has already turned up and I don't have my camera with me as I'm playing 5-a-side football tonight. Everyone was right about the weight though, it is a heavy ...
Posted by Kilo on 17/07/2012 - 13:55
