Search results for 'back focus' - page 1015
Tamron or Sigma 70-300mm
Many thanks to you all for the advice and especially to TimothyW for pointing out the Amazon offer ! Just ordered one, as DelBoy said "He who hesitates, Rodney !" :D It arrived today ! Not bad for Amazon's Super Saver free delivery ! What is more, the price is now back to £270.64 !!! I'm sure...
Posted by PeterKR on 14/12/2011 - 16:43
Sigma 3 year warranty - what next?
I had an email back from Sigma after about a week confirming registration when I bought the 17-70, If you don't hear anything soon give them a call.
Posted by Cliff-P on 12/12/2011 - 13:35
Sigma 150-500mm focusing issue
Had the Sigma 150-500mm for a few months now and it seems to have possibly developed an AF fault. It focuses pretty quickly and accurately up to about 20 metres but anything distant hunts badly. This happens in good contrast situations and on simple subjects like a sign or a distant house. It just g...
Posted by dcweather on 12/12/2011 - 21:23
Sigma 150-500mm focusing issue
I would just ring Sigma armed with your serial number. I had a problem on my 120-400 that was down to a recall that my particular example had missed. I spoke to them Tuesday, Posted it on Wednesday with them saying around a week but I had it back on the following Tuesday all repaired and ready to...
Posted by Hedge on 16/12/2011 - 22:41
Sigma 400mm APO Manual Focus len - enquiry.
Hello All, I bought a Sigma 400mm APO Manual Focus Lens earlier this year second hand. I have only used it a couple of times and have not had much look with getting things in sharp focus. Today when I looked through the lens with a torch I noticed what looks like an internal element having it...
Posted by Yecora99 on 13/12/2011 - 00:03
Sigma 400mm APO Manual Focus len - enquiry.
Cannot speak to that particular lens, but I can get a similar effect. I normally inspect my lenses with a 9-LED torch (I have a handfull of these all over the house) and from some angles, on some lenses, there does seem to be a pattern of small coloured spots on some internal elements. Off-hand, '...
Posted by DoctorJeff on 13/12/2011 - 10:35
Sigma 400mm APO Manual Focus len - enquiry.
This lens is well known for problems with the cement between elements. They are very difficult if not impossible to repair and parts are no longer available. Try a search on Google.
Posted by Algernon on 13/12/2011 - 12:03
Sigma 400mm APO Manual Focus len - enquiry.
Algi has a point these lenses are prone to cement bewteen elements issues that are way to expensive if not impossible to sort out. However, all may not be lost. I have a 400mm preset lens - to focus it I place it on a tripod - open the apeture fully - focus it and then return the apeture to ...
Posted by Stuey on 13/12/2011 - 12:30
Sigma 400mm APO Manual Focus len - enquiry.
Hello All, DoctorJeff - I have done what you advised and can confirm the following. The sizes of the dots are very minute (I say dot's in inverted comma's) because when I say dot's I mean hundreds if not thousands of the little blighter's. When I look from the back of the lens and close t...
Posted by Yecora99 on 13/12/2011 - 23:48
Sigma 400mm APO Manual Focus len - enquiry.
Hello All, DoctorJeff - I have done what you advised and can confirm the following. The sizes of the dots are very minute (I say dot's in inverted comma's) because when I say dot's I mean hundreds if not thousands of the little blighter's. When I look from the back of the lens and close t...
Posted by Yecora99 on 13/12/2011 - 23:52
Sigma 400mm APO Manual Focus len - enquiry.
The sizes of the dots are very minute (I say dot's in inverted comma's) because when I say dot's I mean hundreds if not thousands of the little blighter's. When I look from the back of the lens and close the iris (aperture) the affected element is beyond the aperture mechanism and when I look t...
Posted by DoctorJeff on 14/12/2011 - 10:30
Sigma 400mm APO Manual Focus len - enquiry.
Thanks for your feedback, I think I will dispose of this particular lens, and will get back to using my Tamron 500mm Mirror lens for Wildlife photography. Whenever I have used this 'affected' lens the focusing has never been spot on and all the images have been a little bit blurred (e.g. not shar...
Posted by Yecora99 on 14/12/2011 - 22:50
NOT HAPPY with my DA 35mm F2.4AL
I take it is an IQ rather than focus issue? You have fine-tuned the AF?
Posted by JohnX on 13/12/2011 - 12:18
NOT HAPPY with my DA 35mm F2.4AL
If you're not impressed, then you probably have a faulty example. Send it back and get aniother and I would expect all will be fine.
Posted by johnriley on 13/12/2011 - 13:47
NOT HAPPY with my DA 35mm F2.4AL
It seems to be a focus problem, these are the first two shots taken one with 16-50 and one with DA35. [/img] [/img]
Posted by Still27 on 13/12/2011 - 14:04
NOT HAPPY with my DA 35mm F2.4AL
Try focussing in Live View to rule out focus error. The second shot looks noticeably colder, I'm not sure what caused that! It should definitely outperform the 16-50, most noticeably wide-open, then levelling off towards f8. The 35mm f2.4 is a lens which wants to be used at or near maximum ape...
Posted by Pentaxophile on 13/12/2011 - 14:10
NOT HAPPY with my DA 35mm F2.4AL
I have now taken some shots on Manual focus and the DA35 is about as good as the 16-50, I have adjusted the AF Fine Adjust which was Back Focusing a bit. But the AF seems rather hit and miss at near Ifinity.
Posted by Still27 on 13/12/2011 - 14:17
NOT HAPPY with my DA 35mm F2.4AL
I have just taken two shots (Hand Held) with my K5 Auto focus set to Auto select instead of Spot and the results are a lot better, so I will play a bit more tomorrow and report back. Thanks all for your helpful inputs.
Posted by Still27 on 13/12/2011 - 15:20
NOT HAPPY with my DA 35mm F2.4AL
I'd also try a few with a different target. There's no guarantee the focus points actually match exactly with the indicators in the viewfinder, and the dish is a very small target. Ok, the shot with the 16-50 is fine, but there are a lot of branches, etc in the foreground. Interesting how the co...
Posted by JohnX on 13/12/2011 - 18:07
NOT HAPPY with my DA 35mm F2.4AL
Funnily enough, I was testing my DA35 vs Tamron 17-50 this morning. The DA35 (set to centre point) snapped to focus quickly however the viewfinder view was not in focus. The Tamron snapped to focus as per usual with the centre point in focus in the viewfinder. When I pointed the DA35 in the nea...
Posted by dougf8 on 15/12/2011 - 22:41
