Search results for 'back focus' - page 736
*M lenses shoot wide open on my K100D
AFAIK You can use macs technique of using M mode, but then simply pressing the handy green button to make the camera select exposure rather than switching back to Av
Posted by ikillrocknroll on 06/12/2008 - 02:27
Pentax DA*300MM
COULD I USE THE SIGMA 1.4 CONVERTER WITH THIS LENS AND STILL HAVE AUTO FOCUS?................
Posted by beginner on 06/12/2008 - 23:16
Pentax DA*300MM
I just tried it with mine and no i couldn't use AF. Even in Manual focus i couldn't get a focus confirmation :? But i was using it hand held,so maybe a tripod would help as it was moving around a bit as you would expect.
Posted by Clarky on 06/12/2008 - 23:41
Pentax DA*300MM
COULD I USE THE SIGMA 1.4 CONVERTER WITH THIS LENS AND STILL HAVE AUTO FOCUS?................ Maybe wait for the new Pentax converter :?:
Posted by Hyram on 07/12/2008 - 08:44
smc DA 35mm f/2,8 Macro Limited?
Hi Benoit, I've been using the Pentax 35mm Macro Limited for a few months now, mainly for shooting jewellery, but some other general stuff as well. It really is a lovely lens and I've been delighted with the results I've had. When choosing a macro, I also looked at the Sigma 50mm and 70mm, but...
Posted by Haworth on 13/12/2008 - 12:47
smc DA 35mm f/2,8 Macro Limited?
Macro lens features: 1 They focus VERY close. 2 They are very sharp. 3 They have a flatter field than other lenses - useful when copying documents. 4 They often have a deeply recessed front element - no need for a hood. 5 They are often slower than non-macro lenses of the same focal l...
Posted by George Lazarette on 13/12/2008 - 17:57
smc DA 35mm f/2,8 Macro Limited?
I think the DA35 is a great lens for what you're looking for. It's very sharp and the speed ( 2.8 ) is decent, especially compared to the kit lens and the 55-300 that you have. Makes a good compact walk-around solution when compared to the zooms you mention. The 35mm focal length is very conveni...
Posted by farfisa on 15/12/2008 - 16:37
The difference between 10, 12 and 16?
I am probably going to get an ultra-wide angle zoom when I’m in the UK over Xmas. All the usual contenders have been considered – Pentax 10-17, 12-24 & Sigma 10-20 (Tamron 10-24 will come out too late). Initially was edging towards the Sigma, but as I’ve seen more images from the 12-24 I’ve tended ...
Posted by RichardDay on 08/12/2008 - 12:43
The difference between 10, 12 and 16?
at f8 and 10mm, see how badly the edge performance is compared to the very centre, the DOF at that focal length should be from around 1m to infinity. Hmm I'd have said that before using the lens and others at the wider end. What is DOF - is not just an indication of 'acceptable sharpness' rather ...
Posted by mikew on 09/12/2008 - 20:04
The difference between 10, 12 and 16?
It's quite right that a lens is focused at just one distance, and only things at that distance are in focus. However, things nearer and further away become progressively out of focus, depending upon the aperture, and the eye cannot distinguish the difference until it exceeds a certain threshold. ...
Posted by johnriley on 09/12/2008 - 20:48
The difference between 10, 12 and 16?
Dan I would have done but I'm trying to be on my best behaviour :lol: as I know I've been a little inept with some comments in the past and this thread seemed to be getting a little tense. I thought it was a very good demonstration of what the lens can do. You can read the notes on that sign. I f...
Posted by mikew on 10/12/2008 - 18:35
The difference between 10, 12 and 16?
I don't know what gives you that impression. While Photozone.de always rightly finds things to criticise with any lens, they also have lots of good things to say about this Sigma lens, and conclude: "All in all a good alternative to the native Pentax lens". The distortion and the MTF charts lo...
Posted by Dr. Mhuni on 10/12/2008 - 18:59
The difference between 10, 12 and 16?
Here is a little tool were you can compare focal lengths. It only goes to 11mm but you clearly see the difference between 11mm and 17mm, it's about two/three steps back.
Posted by Anvh on 20/05/2009 - 23:17
The difference between 10, 12 and 16?
Here is a little tool were you can compare focal lengths. It only goes to 11mm but you clearly see the difference between 11mm and 17mm, it's about two/three steps back. That link is fantasticly useful! (and shows FLorence!) yes there is big difference beteween 12 and 17 and less between 12 an...
Posted by max11 on 20/05/2009 - 23:24
Worth a punt?
OK, Mike can you stop now please? I want to have a go :roll: What a steal! a while ago, I paid that much for those extension tubes alone. worth every penny. I was just saying to my better half as I tried to focus my manual 50mm and hold a flash at arm's length, 'I REALLY need an AF lens here' :ro...
Posted by Darkmunk on 08/12/2008 - 11:11
Macro Advice from the experts please!
Roscoe, The harshness can always be softened in Photoshop. The 100mm/2.8 is incredibly sharp - frighteningly so! (I have the old SMC-F version which weighs quite a lot too!) However, the flip side is that the longer focal length produces an even shallower depth of field. So, for Lilly's portraits ...
Posted by MattMatic on 11/12/2008 - 08:55
Macro Advice from the experts please!
Lilly, the Macro will also focus so much closer. The 135mm prime doesn't even approach the close focusing ability of a macro lens. Close focusing is one thing, but the term "Macro" actually means that an object say 1cm long is reproduced on the film/sensor as 1cm long. This is 1:1 magnification -...
Posted by johnriley on 11/12/2008 - 10:49
Macro Advice from the experts please!
Don't turn down one of the older M-series macros, which were excellent and may be easier to find - not to mention cheaper. Manual focus and exposure is not a big problem when doing macro. G
Posted by George Lazarette on 11/12/2008 - 15:36
Macro Advice from the experts please!
Don't turn down one of the older M-series macros, which were excellent and may be easier to find - not to mention cheaper. Manual focus and exposure is not a big problem when doing macro. G Yes that true - thanks!
Posted by Lilly on 11/12/2008 - 15:58
Macro Advice from the experts please!
The only reason I would choose the Pentax over the others is for the Quick Shift which imo would come in very handy on a macro lens. Apart from that I would say there isn't a duff macro lens out there. My favourite and the one I use most is a 30 year old 100mm 1:1 Vivitar f2.8 and I seem to get ...
Posted by Mike-P on 14/12/2008 - 08:51
