Search results for 'back focus' - page 1021
FA50mm F1.4 queries
As the new owner of one of Amazon's recent 'specials' I am trying to get to grips with this lens. I have tested it against a chart to check for focussing and am surprised at edge quality wide open and also CA. I would appreciate feedback from others who have this lens. Any idea why CA is totally dif...
Posted by tigershoot on 01/01/2012 - 22:05
FA50mm F1.4 queries
Different wavelengths of light (colours) are not being brought into focus at exactly the same points, which is why you are seeing colour shifts around high contrast edges. The sort of effect shown at f8 will not really be an issue in real life shots (and can easily be corrected in PP). The colour sh...
Posted by Pentaxophile on 04/01/2012 - 11:23
K5 Lens dilemma for wildlife
When I got my 150-500mm from SRS it was something of a bargain compared to all the other mounts they sold and what was on eBay. However I cannot see it listed presently, wonder why. John errmmmm..... :wink: Well done! It's back (if it ever went away) and at the same price. :P John
Posted by JAK on 03/01/2012 - 20:10
Long Lenses - again! Sigma 300mm v DA*300mm
get the 2.8 if you can. you need the extra stop to produce sharp images at such focal length I use a DA*300mm for most of my wildlife photos and am very happy with it although I am hoping Pentax release a 300mm+ lens soon. I have borrowed a Sigma 300mm F2.8 and found it a bit soft at F2.8 so it w...
Posted by mille19 on 05/01/2012 - 18:52
Long Lenses - again! Sigma 300mm v DA*300mm
DA*300 is a superb lens!,I tend to shoot at F5.6/8 to get the smaller birds fully in focus,and I don't find the 300 limiting,as where there's a will,there's a way!:D
Posted by beginner on 05/01/2012 - 19:51
Long Lenses - again! Sigma 300mm v DA*300mm
The trouble is most of us who are wannabee wildlife photographers are weekend warriors. I can't put a hide up in the local woods at the river bank, and give the kingfisher a few days to get used to it. If I put one up on the Sunday and went back the next Saturday, I can assure you my hide would b...
Posted by Blythman on 06/01/2012 - 13:04
Long Lenses - again! Sigma 300mm v DA*300mm
Know what you mean about being sidetracked with the quality of 300mm, still look back at some of my shots and wish I didn't have to sell it! Do you have any idea how long the shorties will be hanging around for as I'm up for any Sunday or Monday (all day) after this weekend? Really want to try an...
Posted by Unlocker on 06/01/2012 - 21:22
Sigma 18-125 vs Tamron 18-200
Finally gone for the Pentax. What finally tipped the scales was using for the first time the 18-55WR kit lens that came with the K5. It was much sharper and quicker to focus than my old 18-55. So, recognising that there's absolutely no logic to this decision, I came home and immediately ordered the ...
Posted by jwoodman on 15/01/2012 - 15:11
Tameron/Pentax
Cliff why do you think the Tamron is so much better than the Sigma? Had the Sigma 70-300 when I first got my GX10, the IQ was terrible and the Macro (close focus) setting was next to useless, build quality was about the same as the Tamron as was the auto focus, I might have just got a dodgy copy ...
Posted by Cliff-P on 07/01/2012 - 22:17
FA43 f/1.9 - Issue with using Aperture ring with a Pentax K-5
Greetings!In my ongoing pursuit of image sharpness, I just got the beautiful Pentax FA 43mm f/1.9 Limited lens. I thought I'd try using the lens' Aperture ring, so switched the lens out of "A" mode, and tried setting the aperture manually to, say, f/8. After doing this and looking at the Live View t...
Posted by Stevelink on 07/01/2012 - 23:48
Sigma 10-20 f4-5.6 ( or Tamron 10-24) quality & fit in our line up
In terms of your sharpness ratings, I'd give the 10-20 a 7-8* and the Tamron 17-50 a 9.5. * Presuming you can nail focus with it, and at 12mm and UNDER the edges are more like a 6 because of the distortion correction. But you will see distortion with any ultrawide lens at the extreme wide setting...
Posted by Pentaxophile on 08/01/2012 - 17:07
Sigma 10-20 f4-5.6 ( or Tamron 10-24) quality & fit in our line up
Umm, lack of responses ( but thanks Pentaxophile)I guess I'm being over hopeful on people having experience of these specific lenses? I just about scrape into the category of 'experience of both', in that a couple of years back, I spent a while in SRS deciding between the 18-250 and 10-20, so it ...
Posted by ChrisA on 11/01/2012 - 13:08
Sigma 10-20 f4-5.6 ( or Tamron 10-24) quality & fit in our line up
Not much experience of the other lenses (I do have the 55-300 Pentax), but recently bought a Sigma 10-20 f4-5.6 after spending 6 months wondering whether to go for that or the Tamron.....and general "hesitating".... I'm pleased with the Sigma, build quality is very good (better than the 55-300 an...
Posted by DarkM on 11/01/2012 - 20:28
Sigma 10-20 f4-5.6 ( or Tamron 10-24) quality & fit in our line up
I have sold quite a lot of lenses of my collection, the Sigma 10-20mm is the only lens I bought another copy of after I sold the lens previously. It's a great lens, although you have to know how to use it to get great results. Never had any problems with the sharpness in my pictures, just slap it on...
Posted by EricR on 13/01/2012 - 09:15
tamron 28-75mm
thanks again John. i have some good shots with my manual lenses but i find manual focus quite difficult with anything thats moving hense the need for something more af with good iq. will do some more researching on the other glass you mentioned. david
Posted by dave- on 10/01/2012 - 21:01
Thoughts on replacing Tamron 17-50 f2.8 with 17-70mm F2.8-4.5 DC Macro
Have to be honest - when I want macro - I use a dedicated macro lens - short 'macro' zooms don't do it for me - having said that the Sigma will give you more reach - is a decent lens - and will focus much closer than the Tamron Carl
Posted by fritzthedog on 11/01/2012 - 22:56
Thoughts on replacing Tamron 17-50 f2.8 with 17-70mm F2.8-4.5 DC Macro
What about fitting some tubes to a prime 50mm, 100mm or 135mm? Great fun and subject to your lens will produce very sharp macros and will go very close. Cheap primes in these focal lengths are very easy to find. I particularly like my Chinon 50mm F1.9 and my Takumar 135mm F3.5 for Macro shots w...
Posted by davidstorm on 11/01/2012 - 23:06
Thoughts on replacing Tamron 17-50 f2.8 with 17-70mm F2.8-4.5 DC Macro
Hi Patrick As per Frogfish - the Raynox DCR250 is a brilliant (and cheap)way into macro photography. I have used it with rings and the standard clip - to be honest, nowadays I just use the clip. It is always with me as it will convert ant lens to macro in as much time as it takes to get it ...
Posted by LSJ on 12/01/2012 - 13:59
Thoughts on replacing Tamron 17-50 f2.8 with 17-70mm F2.8-4.5 DC Macro
Will do some with the 17-50mm and Raynox tomorrow (day off) and you can have a look then. Will have to be a link though as it will be with the Canon 50D (don't that the 17-50mm in Pentax mount.). Don't expect too much though .. Raynox is best on a 200mm. "Don't expect too much though." That's wha...
Posted by dinneenp on 12/01/2012 - 14:02
Thoughts on replacing Tamron 17-50 f2.8 with 17-70mm F2.8-4.5 DC Macro
Thanks. But people have told me that the Raynox wouldn't be great on at focal length of 50mm (I have a 30mm f1.4, 17-50 f2.8 and 70-200 f2.8 lenses). If anyone here has a Raynox and a 50mm/17-50mm lens could you take some 'macro' shots and post them here please? If they're acceptable I'd go with th...
Posted by Frogfish on 12/01/2012 - 19:06
