Search results for 'back focus' - page 1063
Question for users of more than one Sigma lens
If Chris is lucky, then so am I, so is Sue, so are brother/sister-in-law, in fact lots of photographers we know as well, including many professionals. Whatever it is you are all on... can I have some? :P Many, many professionals do need focus adjustment. That's why Pentax put the custom option in...
Posted by MattMatic on 23/10/2012 - 13:43
Question for users of more than one Sigma lens
Many, many professionals do need focus adjustment. That's why Pentax put the custom option in their higher end dSLRs ;)Matt ...is it the photographer that needs adjustment or the camera? (sorry, couldn't resist that!)
Posted by timd on 29/10/2012 - 11:31
Overwhelmed by choices....
Join the club. I've been trying to make a similar decision and for the all my trips in the last 2 years....Whatever you choose, you will wish you had done differently so go with the best choice at the time. If you buy good used you will rarely ever make a loss on re-sale if (when) you change your...
Posted by milamber on 22/10/2012 - 15:21
Overwhelmed by choices....
Beware the Sigma 70-300 if you need the 300mm the most. I have the apo non o/s version it's great at 70mm - still good at 135mm and at 200mm but from 210mm on the iq drops notably - it is better to shoot at or below 200mm and then crop - I am told that the Pentax 55-300 is much better at 300mm bu...
Posted by Stuey on 22/10/2012 - 20:55
Overwhelmed by choices....
I would also think that a 18-135 + 55-300 would be a good investment, if your budget allows both. When you will be back, the 18-135 would be a great lens to have. And there is an used one for sale in the classifieds.
Posted by giofi on 23/10/2012 - 22:21
55-300 with TCs?
Hi, I tried it with a metering but manual focus Teleplus MC4 2 X. I concluded that you got a better image by cropping. I think TC's are only any good on prime lenses.
Posted by wvbarnes on 22/10/2012 - 22:14
55-300 with TCs?
Works well with the Pentax_A 1.4x-s but you have to manual focus, which is easy at 420mm. I don't notice any image degradation. These were handheld at 420mm and 1/250th sec with SR set by mistake to 28mm :oops: This was against the light so not very good and I haven't tried to impro...
Posted by Algernon on 23/10/2012 - 09:10
55-300 with TCs?
Hi Dave There have been a few threads about the 55-300 and its dislike for filters, especially circular polarisers, but also UV filters. I have used mine extensively both with and without a UV filter and it performs far better without. I gave up trying with a polariser as it was impossible to f...
Posted by davidstorm on 24/10/2012 - 00:45
55-300 with TCs?
Hi Algi With the polariser on the 55-300 it was not a light issue, it was a focus issue. The lens will not focus at all with a circular polariser fitted, whether in auto or manual focus. I can't explain why, but it's true. I have tried different circular polarisers on mine and it will not prod...
Posted by davidstorm on 24/10/2012 - 21:07
55-300 with TCs?
I had a problem with my 55-300 and a UV filter. The lens would not focus.
Posted by darkskies on 24/10/2012 - 21:15
Poll: AF Accuracy Adjustments
Following on from some replies in another thread, I'd be interested to know how many of us here have had to make fine tuning adjustments in-camera for AF inaccuracies to correct either back or front focussing issues.
Posted by Mannesty on 23/10/2012 - 07:17
Poll: AF Accuracy Adjustments
Both 16-50 and 60-250 were ok on K20D before SDM failure....Repaired lenses focus perfectly without correction. No such issues with DA*300. All spot on on the K-5
Posted by ilovesaabs on 23/10/2012 - 09:27
Poll: AF Accuracy Adjustments
All my lenses were fine on the K20 until one day when they all back-focused. There wasn't enough adjustment without hacking but a global adjustment sorted everything
Posted by gartmore on 23/10/2012 - 10:31
Poll: AF Accuracy Adjustments
I have a Sigma 28-70mm f3.5-4.5 Epsilon that back focusses a little, especially close to. If/when I upgrade from the K200D I use, maybe I'll be able to fix that and it'll get some more use. It's a shame really, as it's very solidly constructed and in perfect condition. Andrew
Posted by andrewk on 23/10/2012 - 13:44
Poll: AF Accuracy Adjustments
I hadn't made any adjustment but prompted by this thread I checked my new DA* 300 which needed +3 on my K-5, then checked my Sigma 70-200mm 2.8, which needed -5. Interesting the pixel peeping to look at the focus point illustrated how the 300mm was noticeably sharper wide open (f4) than the Sigma...
Posted by rscoote on 23/10/2012 - 15:49
Poll: AF Accuracy Adjustments
I looked at one of my lenses. Adjusted it. All seemed fine. Used it on a couple of outing and images weren't sharp. Adjusted it again. And I ended up back at zero. And it was spot on. Go figure :shock::?
Posted by Blythman on 23/10/2012 - 15:56
Poll: AF Accuracy Adjustments
I hadn't made any adjustment but prompted by this thread I checked my new DA* 300 which needed +3 on my K-5, then checked my Sigma 70-200mm 2.8, which needed -5 Is there a usable guide on how to do this (apart from the manual)? Is a focus chart essential?
Posted by DaveHolmes on 23/10/2012 - 15:57
Poll: AF Accuracy Adjustments
I hadn't made any adjustment but prompted by this thread I checked my new DA* 300 which needed +3 on my K-5, then checked my Sigma 70-200mm 2.8, which needed -5 Is there a usable guide on how to do this (apart from the manual)? Is a focus chart essential? There are special set ups you can buy speci...
Posted by rscoote on 23/10/2012 - 17:05
Poll: AF Accuracy Adjustments
Perhaps JR, SR, & family will check theirs now The lenses/cameras have been checked and show no problems. One of the things that I have a concern about is described well by one poster above, that is, the lenses were adjusted and ended up back at zero. We shouldn't expect a lens to need adjustmnen...
Posted by johnriley on 23/10/2012 - 21:45
Poll: AF Accuracy Adjustments
I can understand people not checking their lenses,I never have, last week after purchasing a 31 Limited and seeing it was not any better than my other lenses,apart from the boken ,which was dreamy,it started me thinking,I know that it is dangerous,so after seeing what has been written about the 31 I...
Posted by montyaus on 23/10/2012 - 23:29
