Search results for 'back focus' - page 1035
DXO test some Pentax Lenses
I wonder if some of the testing is a bit careless. There is a sentence which reads: For more information, see the complete DxOMark results for the Pentax SMC PENTAX DA 14mm F2.8. The link here goes to the DA 15mm review, not the 14mm. The test results are only as good as the person doing the tes...
Posted by JAK on 21/03/2012 - 10:46
DXO test some Pentax Lenses
I am a little surprised at the DxO results on these lenses (they DID after all put the K-5 as the 5Dmk2 killer..) but at the end of the day they do measured tests in the lab rather than real world tests of the lenses for the applications that they are intended for. Initially I was taken aback with...
Posted by Offertonhatter on 21/03/2012 - 19:59
DAL 50-200 to DA 55-300
I am feeling the need to buy a new lens! Currently own the two 'L' mk2 kit lens and the lovely 35mm Plastic fantastic on a Km. Its probably a well worn question, but apart from the 100mm & QS (which will be useful) what will I gain from swapping for the DA55-300? I have been pretty pleased with ...
Posted by smegg79 on 22/03/2012 - 19:45
Samsung 16 - 45mm
Hi Simon, no difference optically, only cosmetic branding and colours. Also the rubber on the lens focus ring is different but that's about it. Regards David
Posted by davidstorm on 22/03/2012 - 23:16
spec me a lens- aviation,zoo use
Hi Looking for some advice. Heading to England in the summer to visit various raf sites ,zoos etc and RIAT. At the moment I have the following lenses Pentax 50-200 wr and dal Tamron 70-300 Sigma 100-300 Kit lens All used on a k10d/k100d Reading around there are conflicting opinions o...
Posted by Darkman on 23/03/2012 - 08:56
spec me a lens- aviation,zoo use
The Sigma is an older lens - cant remember which model it was picked up very cheaply a while back Starting to sway toward the 55-300 and an upgrade to a k-5
Posted by Darkman on 23/03/2012 - 10:18
spec me a lens- aviation,zoo use
The 55-300 is the obvious suggestion and it's a great value for money lens. You may also consider the M 400/5.6 manual focus of course (and a little prone to PF) but very very sharp !
Posted by Frogfish on 23/03/2012 - 10:20
spec me a lens- aviation,zoo use
Hi Darkman, For aviation you definitely need a zoom (and unless you're getting really serious - step ladders and the like!) 300mm is as far as you practically want to go on an APS-C format. The wide end of the 150-500 is going to be too long for larger aircraft). Body wise I really like my K-5...
Posted by johnha on 23/03/2012 - 10:23
spec me a lens- aviation,zoo use
Don't be telling me that. The 55-300 was going to be my lens of choice for riat. If I don't buy a 150-500 that is. Steady,steady!! They are two entirely different lenses for two entirely different applications and intended markets! The 55-300 is a lovely lens for its intended use - mine stays...
Posted by jeallen01 on 26/03/2012 - 17:28
spec me a lens- aviation,zoo use
I have spent a day at the air show in Adelaide on the weekend not having done any of this before.it was a good experience for me. I used the 150-500 sigma hand held, it is a heavy lens,but it does give more stability, I used it at 150 and 500, at times 150 was too long and 500 was OK the weight d...
Posted by montyaus on 27/03/2012 - 04:21
Upgrading my Sigma 70-300mm F4-5.6 APO DG
The obvious choice as a replacement would be the DA55-300. Not very expensive, light weight but very good for the money, definitely a step up from the Sigma 70-300. Have a look around this site to see some of the images this lens produces. As for macro, the 'macro' on the sigma is really only clo...
Posted by doingthebobs on 26/03/2012 - 18:28
Upgrading my Sigma 70-300mm F4-5.6 APO DG
If you are serious about insect shots, I would concur with the previous post and get a dedicated macro lens. The obvious choice of zoom would then be either the DA L 55-300 or the DA 55-300. They are exactly the same optically, but the 'L' version is the lighter in weight, has a plastic mount, no ...
Posted by davidstorm on 26/03/2012 - 20:49
Upgrading my Sigma 70-300mm F4-5.6 APO DG
I too used to have the Sigma 70-300 APO and upgraded to the Pentax DA 55-300mm, MUCH better optical quality..particularly at 300mm and I find the 'Quick shift' very useful Hi Michael, How old was your Sigma 70-300? I have a 70-300 APO Super from around the time when they were started to be also m...
Posted by johnha on 26/03/2012 - 22:23
Upgrading my Sigma 70-300mm F4-5.6 APO DG
I too used to have the Sigma 70-300 APO and upgraded to the Pentax DA 55-300mm, MUCH better optical quality..particularly at 300mm and I find the 'Quick shift' very useful Hi Michael, How old was your Sigma 70-300? I have a 70-300 APO Super from around the time when they were started to be also m...
Posted by michaelblue on 26/03/2012 - 22:41
Quick macro lens query
When I use my 2x macro teleconverter with my 50mm lens I can adjust the magnification in small increments from 1:3 to 1:1. I find this particularly useful if using a tripod so I can make minor focusing adjustments by altering the magnification, rather than shifting the tripod a few mm each way. W...
Posted by milamber on 28/03/2012 - 08:43
Quick macro lens query
A true macro lens simply focuses closer than a standard prime. Having set the camera up on a tripod in approximately the right position you focus as usual. If you want a greater or lesser magnification you then have to move the camera and refocus. Alternatively, if you want a specific magnificati...
Posted by womble on 28/03/2012 - 09:11
Quick macro lens query
I played with manual extension tubes on an old FA film zoom for a while. Not very good but useful for learning. My recent cheap Sigma F2.8 50mm macro (£213 from Microglobe)goes from 1:5 at around 350mm to 1:1 at 18.8mm which is of course very close. A longer lens in the series would allow further...
Posted by wvbarnes on 28/03/2012 - 09:47
Quick macro lens query
Thanks. Bill, if you can't focus at 1:1 because you are slightly too far away can you adjust the magnification to say 1:1.5 rather than move the whole setup. The earlier replies imply not, but yours seems to suggest you can. That's what I can do with the teleconverter which is very useful, but at...
Posted by milamber on 28/03/2012 - 10:36
Idea of lens value and TC
I have a Tokina 70-210 Macro SD II f4-5.6 no hood, from a friend. Not used it much yet but the macro is not a true macro. More close focus from min 1.1m the thing is built like a tank, it feels solid. Need to give it a try and see what it can do. Will
Posted by Whizzkiddwill on 30/03/2012 - 21:18
Sigma 150 500 Problem
Hi I have had my 150 500 Sigma now for around a year and use it virtually every day - birds, macro anything when out and about. On Sunday when I was shooting starlings the camera suddenly went into Manual Focus and displayed the following on the back of the camera F--- No F stop numnber and t...
Posted by QuestionableCarrot on 03/04/2012 - 15:30
