Search results for 'back focus' - page 1029
Advice on glass for my k-x
I think you may be meaning the Sigma 70-300mm DG APO Macro lens? If so, it is not really Macro, just focusses a little closer. If you're interested in true macro photography it's useless, you need a real macro lens. Regards David David I can't really agree that the macro in the Sigma (and the...
Posted by Frogfish on 19/02/2012 - 04:49
Which fast normal prime?
Thanks for your support so far - very useful - but I still have some questions left: Which prime will give the best overall performance for shooting indoor playing kids / landscapes / available light / portraits (I will buy only one prime)? Are there any quality problems to be expected with th...
Posted by Bandit2006 on 17/02/2012 - 21:33
release date for 560mm ???
60-250mm was on there for approx 4 years I think. Personally I wouldn't hold my breath. As for your poll, impossible question without knowing the full details such as af speed, sharpness @ f5.6, weather sealing, type of focus motor, etc etc.
Posted by Mike-P on 17/02/2012 - 16:19
release date for 560mm ???
Coming back to the dangers of comparing chalk with cheese, the Pentax-A 1:4 200mm weighs 405gms, and the A* 1:2.8 weighs 850gms. One stop doubles the area of the glass and more than doubles the weight of it (all else being equal). Obviously the mount is the same, but the fact remains that the Pe...
Posted by George Lazarette on 18/02/2012 - 11:13
release date for 560mm ???
I am going to stick my neck out & think Pentax will price this lens at £2499 & release September. A rebate of £250 by december and then a price drop in february to £1999 where it will most likely stay. It is an important release, it will bring some credibility back to the brand. If they make ...
Posted by cabstar on 18/02/2012 - 12:16
Sigma Vs Sigma
Carl - isn't there an issue with the Pentax version of the 17-70 at or around 50mm (AF won't focus if I remember correctly) ? I know I've seen a few people who have said their's had it. Maybe someone here knows of the problem but in any case I'd research that first before putting my money down.
Posted by Frogfish on 18/02/2012 - 16:53
Sigma Vs Sigma
Carl - isn't there an issue with the Pentax version of the 17-70 at or around 50mm (AF won't focus if I remember correctly) ? I know I've seen a few people who have said their's had it. Maybe someone here knows of the problem but in any case I'd research that first before putting my money down. I ...
Posted by Mike-P on 18/02/2012 - 16:56
Sigma Vs Sigma
Happy to report it works perfectly from 50mm t0 70mm, I don't have to use my finger to make it focus correctly. :D My one's Ok too in this respect. It's not particularly new either.
Posted by ChrisA on 18/02/2012 - 17:24
Sigma Vs Sigma
Hi All Well I went and tried it and bought it - fired off a few test shots this afternoon - focus seemed fine at all ranges. may post a couple of the test shots here once I have loaded them Thanks all Carl
Posted by fritzthedog on 18/02/2012 - 19:49
Sigma Vs Sigma
focus seemed fine at all rages. Yup, I sometimes shout and scream at mine for ages but it still focuses fine.
Posted by Mike-P on 18/02/2012 - 19:52
Sigma Vs Sigma
focus seemed fine at all rages. Yup, I sometimes shout and scream at mine for ages but it still focuses fine. Now you see Mike - now that I have corrected the typo - your comment just seems bizarre :oops:
Posted by fritzthedog on 18/02/2012 - 20:06
XR Rikenon 135/2.8 OR Carl Zeiss Jena 135/3.5 (zebra)
Tomioka is actually part of Kyocera and still going today: http://www.kop.co.jp/english/company/index.html quote: Kyocera Optec, originally founded in 1949 as Tomioka Optical and Mechanical Manufacturing Co., Ltd in Ome City, Tokyo, has constantly developed leading-edge lens manufacturing t...
Posted by Algernon on 19/02/2012 - 16:43
XR Rikenon 135/2.8 OR Carl Zeiss Jena 135/3.5 (zebra)
Looks a decent lens.... even the corners are sharp. It's hard to tell with the CZ 135mm's some of the older Zebra lenses etc. sometimes have much better bokeh, so as long as the aperture ring M/A switch work and it's got reasonably clean optics I'd buy it. They are sometimes a bit stiff to fo...
Posted by Algernon on 20/02/2012 - 21:35
XR Rikenon 135/2.8 OR Carl Zeiss Jena 135/3.5 (zebra)
You might find this 135mm shootout interesting. http://oomz.net/135/ The Pentax-M 135mm f/3.5 isn't included, but it is a sharp lens. It hasn't got the bokeh of the CZ and close focus isn't very good. I found the Jupiter 37A to be sharper than both and similar to the CZ in bokeh, which it...
Posted by Algernon on 21/02/2012 - 09:24
XR Rikenon 135/2.8 OR Carl Zeiss Jena 135/3.5 (zebra)
A lot of CZ lenses were made in Japan with a bayonet that wasn't adaptable to AF and had they brought out a Contax AF Camera it would have meant everyone who had bought the expensive MF lenses buying the same lenses again in an AF mount :cry: They had previously let their users down by stopping...
Posted by Algernon on 21/02/2012 - 11:17
Reverse lens for macro photography
Macro: 50mm general purpose lenses do not have flat fields like macro lenses do, but the f1.7 was the right choice for this as it is much better than the f1.4 up close. Performance can be vastly improved by reversing the lens and a reverse adapter K in 49mm size is required. SRB Griturn will have th...
Posted by johnriley on 20/02/2012 - 09:08
Reverse lens for macro photography
Incidentally No one has mentioned yet that the lens needs to have a manual aperture adjustment. The M50/1.7 provides this and for that matter manual focus but you will lose all the automatic facilities that your camera provides. Metering, whilst (at least on my cameras) works moderately well, it's ...
Posted by Frogherder on 20/02/2012 - 12:06
Reverse lens for macro photography
Following photo shows both. To reverse the lens onto the camera you need the bottom one great, thanks for the pic - this is exactly what I need - will look for it tonight @womble - indeed I will, the main purpose is for portrait work but I fancied using it for macros as well. The focus for me ...
Posted by mumin999 on 20/02/2012 - 12:39
Ok Ok I know! 17-70 Vs 16-50
Yes done to death! Right I ordered A 17-70 F4 SDM With my K5 it has arrived and I'm quite dissapointed with the Build, I seem to have missed in all my research the point about the Rotating Focus ring, it's really irksome to me. I am pepared to send it back for a 16-50mm F2.8 SDM but I'm wondering w...
Posted by jules on 20/02/2012 - 09:33
Ok Ok I know! 17-70 Vs 16-50
I love my 17-70 it lives on my K5 90% of the time. Focus spot on, IQ great and nothing wrong with the build as far as I can see, I dropped it the other day but it suffered no damage and works perfect.
Posted by john941 on 20/02/2012 - 09:56
