Search results for 'back focus' - page 811
SMC Pentax AF Adapter 1.7x TC from EBAY
Watched one on eBay two days back. I was tempted but I have only two lenses that I might use it with, a 200mm f/2.5 and a A*300mm f/4. Regards
Posted by K10D on 19/09/2009 - 17:31
SMC Pentax AF Adapter 1.7x TC from EBAY
Watched one on eBay two days back. I was tempted but I have only two lenses that I might use it with, a 200mm f/2.5 and a A*300mm f/4. Regards I think you will find a few people that think it works well with the DA*300
Posted by bforbes on 19/09/2009 - 19:03
SMC Pentax AF Adapter 1.7x TC from EBAY
Sure - is a bit of an outlay. One of the key gains for me is that it is a tiny piece of extra kit to carry - so rather than humping around a massive lens that, to be honest I could not source, afford, justify or carry, I can carry the adapter for (especially) wildlife which is just a little too far ...
Posted by kfxposure on 19/09/2009 - 19:31
Pentax Has No Long Lens
To be honist, I am not surprised that Pentax don't currently offer any lens beyond 300mm. Until the Pentax K-7, the shutter/mirror noise was too loud for nature photography and the focus too slow for sports. What the K10/K20 were good at was being a studio camera. And that is why Pentax concent...
Posted by beakynet on 21/09/2009 - 10:42
Pentax Has No Long Lens
I think we agree? A 300mm lens on a 35mm is then enlarged by whatever the ratio is, up to 6x7 or there abouts. Do we then say that the 300mm lens is equivalent to 300mm x the ratio? Focal length of a lens is, I believe, fixed. What we do with it's projected image surely cannot alter that? The...
Posted by Anvh on 21/09/2009 - 11:28
Pentax Has No Long Lens
To be honist, I am not surprised that Pentax don't currently offer any lens beyond 300mm. Until the Pentax K-7, the shutter/mirror noise was too loud for nature photography and the focus too slow for sports. I can't really agree with that though, how on earth would we have photos of sport 50 years ...
Posted by beakynet on 22/09/2009 - 11:08
Pentax Has No Long Lens
To be honist, I am not surprised that Pentax don't currently offer any lens beyond 300mm. Until the Pentax K-7, the shutter/mirror noise was too loud for nature photography and the focus too slow for sports. I use the K20D for wildlife and Superbike races, no problems.
Posted by johnwhit on 11/05/2010 - 16:05
Pentax Has No Long Lens
I can't understand the need for new lenses some people show. Auto focus is a nice extra perhaps, but not in any way essential. Even auto aperture is not totally essential, though it does add a lot to the usability of a lens especially when the subject is changing rapidly. In addition I'm not upset ...
Posted by petrochemist on 12/05/2010 - 18:51
Pentax Has No Long Lens
I do find a xxx-500 essential for safari shooting. The guide gets worried if you get out of the car and sneak up on the animals! Going back to Kenya on Safari in 12 days. I found the F*300 lens too long for the job so have invested in the DA*60-250 for this trip :D
Posted by mayday on 12/05/2010 - 23:27
Tokina 80-400mm Pentax KAF fit
Don't all AF lenses automatically register the focal length? Possibly, even probably, but as I have had Pentax Ka bayonet lenses that do not, I was just being cautious in making that statement! None of the manual focus Ka mount lenes I have register the focal length
Posted by bforbes on 22/09/2009 - 15:23
Tokina 80-400mm Pentax KAF fit
None of the manual focus Ka mount lenes I have register the focal length Pentax ones should do, in the context of the the SR system not asking you what the focal length is. The EXIF is another matter.
Posted by johnriley on 22/09/2009 - 15:24
Tokina 80-400mm Pentax KAF fit
You could try cleaning the contacts. Of course it's so long since I used manual focus lenses that I might just be wrong.
Posted by johnriley on 22/09/2009 - 15:42
Tokina 80-400mm Pentax KAF fit
Of course it's so long since I used manual focus lenses that I might just be wrong. I’m very reticent about disagreeing with someone with your knowledge base. But I think you must be wrong :(
Posted by bforbes on 22/09/2009 - 16:11
Tokina 80-400mm Pentax KAF fit
You could try cleaning the contacts. Of course it's so long since I used manual focus lenses that I might just be wrong. I think on this occasion you are, John... with all my manual focus KAs it asks for the focal length on start up. That's only with SR on, of course. If it's off, it doesn't. ...
Posted by ChrisA on 22/09/2009 - 16:14
Is width everything?
I went through this process a while back - see the following thread, which has some very useful feedback in it: As you'll see from my last comment in that thread, I went for the DA12-24 and haven't regreted it. It's a superb lens. Good as the Sigma might be - and many swear by it - I find it h...
Posted by Dr. Mhuni on 22/09/2009 - 05:03
DA*16-50mm suitable for landscapes?
I'd risk my 16-50 in a light drizzle, but not in pouring rain. My 16-50 has been out a few times in pouring rain, not a single problem. As Matt says just wipe down afterwards and leave to dry :wink: A little (rubbish) example of the conditions DA* lenses can cope with :shock: Back to the ...
Posted by Greytop on 22/09/2009 - 12:46
DA*s - Internal Dust
My DA* 50-135mm was fine until it was serviced. When it came back I thought I saw a hair, but that seems to have gone now so it may have been outside, or has fallen into the works! Other than that, it seems fine. The odd bit of dust won't hurt.
Posted by womble on 22/09/2009 - 12:25
DA*s - Internal Dust
I realise that, which is why I didn't take it back :) I've never noticed this issue with my "Made in Japan" lenses though... R
Posted by Reuben0 on 22/09/2009 - 14:52
Pentax DA 16-45
twoz me, and yes I feel quite odd in not liking it. I'm sure it's just me. It can be very sharp but is very soft wide open. It focuses fast but noisily. Paulyrichard is a perfect example of someone who gets on with the lens. It is clearly a very capable piece of kit, but my post was all about t...
Posted by Darkmunk on 23/09/2009 - 23:04
Pentax DA 16-45
Another vote for the DA16-45. I actually haven't used it that much since I bought mine but have been very pleased with the results - it's a significant step up from the kit in terms of performance and in the extra 2mm, which is great. Contra to Darkmunk's experience mine performs pretty well from wi...
Posted by Dr. Mhuni on 24/09/2009 - 05:08
