Search results for 'back focus' - page 1101
M42: Am I missing something?
Welcome back and good luck with whatever M42's you pick up. I was new to Pentax when I bought my K-r and one of the reasons for getting it was that I had some M42 lenses including an old Helios 58mm f/2.0 from my old Zenit 35mm SLR. There are several options from very cheap to not so cheap but...
Posted by PeterKR on 11/08/2013 - 12:27
M42: Am I missing something?
Using M42 lenses is one of the great pleasures of Pentax ownership, I think. I loved rotating my very cheap collection of no-name primes before the whole lot were stolen "in one fell swoop". Haven't had the heart or will to replace them (even if I could.) Doesn't the focus peaking built into the ...
Posted by bwlchmawr on 11/08/2013 - 19:51
M42: Am I missing something?
Thanks everyone for all this info, my ebay watch list is growing in line with my motivation! bwlchmawr, I have used the focus peaking on my K30 and it is helpful but not always spot on accurate with an open lens in my experience. That may well be an operator problem :lol: but it if you have a ...
Posted by K30git on 12/08/2013 - 08:58
Sigma 120-400 experiences
I have both - both great lenses - the 120-400 is a shade faster and seems to focus slightly quicker and is easier to hand hold. IQ is virtually identical and you do of course have the longer reach with the 150-500 I had the 120-400 first and then bought the 150-500 for the extra reach intending ...
Posted by fritzthedog on 11/08/2013 - 18:58
Sigma 120-400 experiences
I have both - both great lenses - the 120-400 is a shade faster and seems to focus slightly quicker and is easier to hand hold. IQ is virtually identical and you do of course have the longer reach with the 150-500 I had the 120-400 first and then bought the 150-500 for the extra reach intending ...
Posted by Daronl on 11/08/2013 - 20:39
Lens advice please
I did a while back and mainly used the Sigma 100-300mm f4 but I could have done everything with the 17-70mm and 70-200mm 2.8
Posted by Mike-P on 12/08/2013 - 21:55
FA* 80mm - 200mm f/2.8 (Fantastic & Amazing? Anyone Agree?)
I have been looking for a Pentax SMC FA* 80-200mm for some time and even posted a request for one on here. I never shot film with any brand, but as a child remember Pentax. Anyway I now know why the FA* lenses were held in such high esteem by photographers. My lens arrived just before I was about ...
Posted by Fletcher8 on 13/08/2013 - 18:55
FA* 80mm - 200mm f/2.8 (Fantastic & Amazing? Anyone Agree?)
McGregNi I agree that the flower with petals image does have purple fringing. However the FA* 80 - 200 is not really the best lens to use for this type of image anyway (my opinion) also the image is cropped. For my intended use, I think the FA* 80 - 200 will work very well, I use the DA* 200mm an...
Posted by Fletcher8 on 14/08/2013 - 23:27
Sigma 17-50mm, Sigma 17-70 or Pentax 17-70
Just to throw a curveball (as they say in New York), are you sure it's the midrange zoom you want to replace? It's a personal thing, but I'd be looking for a wide zoom say 10-20 or 12-24. I sold my midrange because I never use it. I'm not saying it doesn't have it's place, but I tend to carry...
Posted by greynolds999 on 14/08/2013 - 09:59
Fron focus on Tammy 17-50
Hi I have just bought a new Tamron 2.8 17-50 and did a front/back focus test, as I do for all my lenses. Well the results are not great as it is front focusing quite significantly, and to get it right I had to use the maximum adjustment available in k20d body (-10 value). I am now considering wh...
Posted by Pietrach on 15/08/2013 - 13:13
Fron focus on Tammy 17-50
Send it back ... my max adjustment on a lens is +/- 5, any more than that and it is returned.
Posted by Mike-P on 15/08/2013 - 13:31
Should it squeak ?
I recently purchased an SMC F 50mm f1.7 from eBay. I paid a fair price based on what I have seen advertised here. The problem I have is that the iris 'squeaks' when it closes both when stopping down whilst shooting in A mode and when the lever is moved when off camera. The seller has been very r...
Posted by GaryJohn on 17/08/2013 - 15:31
front focus - camera or lens problem
hi i got tamron 17-50 recently and found that is suffers front focusing badly. i had to use maximum vailable adjustment in k20d to get correct focus at 50mm but... now i get back focus at 17mm :/ i cannot set an adjustment that would fix all focal lengths. is it a camera o lens problem? my k20 works...
Posted by Pietrach on 18/08/2013 - 21:08
front focus - camera or lens problem
Interesting. I just got a Tamron 70-200 f2.8 and found it front focussed at 200mm and back focussed at 70mm, at about 135mm it was ok. I've only just sent it back, awaiting a replacement. Wonder if it's a Tamron thing.... or something else. Jeff
Posted by screwdriver222 on 18/08/2013 - 21:49
front focus - camera or lens problem
The recommendation for AF fine adjustment with a zoom is either to average the adjustment having checked at both ends and middle of the range, or to adjust for the focal length you use most.
Posted by JohnX on 18/08/2013 - 22:19
Pentax Lenses on Other Manufacturers Full Frame?
It's often a hard way to achieve things, but for what is and isn't possible then I'd suggest SRB Griturn, who make any adapter known to man and probably a few that aren't. AF and metering are usually lost and sometimes infinity focus is too. Without an aperture ring, such as in DA lenses, then yo...
Posted by johnriley on 19/08/2013 - 13:33
Mulitple adaptors and Macro effect
the EOS flange to film distance is shorter than that for K mount, so no purely mechanical adaptor is possible to go EOS lens to K body without losing infinity focus, sadly. Sometimes you get partially optical adaptors which do this sort of thing, but they act as short teleconverters and there is ...
Posted by Mongoose on 20/08/2013 - 13:25
Mulitple adaptors and Macro effect
M42 should be much easier, there is an official adaptor which maintains infinity focus. You have to use one of the ones which fits inside the mount (like the official one), some of the cheap ones extend in front of the camera body and these will loose infinity. Some people have reported prob...
Posted by Mongoose on 21/08/2013 - 13:06
Tamron 70-200 mm f2.8 - opinions
I tried it with various TC's, but found auto focus to be pretty temperamental. On it's own a good lens though.
Posted by bforbes on 20/08/2013 - 19:55
Pentax SMC-F 35-70mm, How much?
I owned one of these a while back but had to bin it this week as it was full of fungus when I came to use it this week.I must admit I havent used it for years, but now I want another as i have found it bridges a nice gap in my lens line up. But having a look round, prices seem to range quite wide...
Posted by MattyH on 20/08/2013 - 20:27
