Search results for 'back focus' - page 689
how much better would a 50mm prime really be?
Using a 50mm lens on a DSLR is equivalent to using a 75mm lens on 35mm, which makes it a fair enough portrait lens. Personally I would prefer something slightly longer, but that's quibbling! A lens can be in focus but give a soft effect because of residual abberations and lower resolution. This i...
Posted by johnriley on 13/11/2007 - 15:56
how much better would a 50mm prime really be?
I've been playing around with a number of, mostly very cheap, 50mm(ish) primes recently and have some galleries up with example shots from a few of them: Porst 55mm F1.2 ( ) Helios 44-2 58mm F2 ( ) CZJ Tessar 50mm F2.8 ( ) Pentax SMC-A 50mm F1.7 ( ) Vivitar 55mm F2.8 Macro ( ) I've got a f...
Posted by niblue on 14/11/2007 - 09:58
how much better would a 50mm prime really be?
I've been playing around with a number of, mostly very cheap, 50mm(ish) primes recently and have some galleries up with example shots from a few of them: Porst 55mm F1.2 ( ) Helios 44-2 58mm F2 ( ) CZJ Tessar 50mm F2.8 ( ) Pentax SMC-A 50mm F1.7 ( ) Vivitar 55mm F2.8 Macro ( ) I've got a f...
Posted by Voe on 16/11/2007 - 12:56
Voigtlander APO-Lanthar 125mm/2.5 SL
It arrived yesterday in the post. :D Guess what I will be doing this weekend? However, I am inpressed already. The whole thing just oozes quality. The box is very thick high grade card. The inner is such a snug fit that it is slightly difficult to remove as you have to overcome the "suction&qu...
Posted by Kim C on 13/11/2007 - 13:12
Voigtlander APO-Lanthar 125mm/2.5 SL
I don't find MF a limit. In fact for detailed work such as macro, I find it to be a positive advantage. I can focus where I want instead of where the camera thinks I want. :wink: Kim
Posted by Kim C on 15/11/2007 - 08:42
Lens rental
Alot of places have a two week return policy.... nice to know, if you're on the fence about buying.... be warned, it's really hard to take it back after you've had a week to get attached to it..... I'd make the plunge on the lens, and cut back on the meals, if I were in your shoes......foriegn ...
Posted by Don on 13/11/2007 - 23:41
Pentax SMC A 50MM - how good
Seriously considering picking up one of these manual lenses & wondered about peoples experience regarding both image quality & ease of use/focusing accuracy Having been only used to auto-focus lenses how will I find this to use ? thanks simon
Posted by simonkit on 13/11/2007 - 23:00
Pentax SMC A 50MM - how good
When manually focussing a lens, four things help. 1 Bright light. It's much harder to focus in low light. 2 A fast lens. All 50s are relatively fast, and this helps a lot. 3 A split image or ground glass focussing screen. These are seldom found on AF cameras, but if you want to use ...
Posted by George Lazarette on 14/11/2007 - 08:32
Pentax SMC A 50MM - how good
I've been using lots of manual focus lenses on the K10D and *istDS recently and the SMC-A 50mm F1.7 was one of those lenses. I've had no issues focusing it, with or without using the AF confirm, including in reasonably low light conditions - being a reasonably fast lens helps a lot. I put a few test...
Posted by niblue on 14/11/2007 - 09:46
Pentax SMC A 50MM - how good
I have just received the poor relation of the 50mm family the f2 version and so far I am impressed. Small and light, easy enough to focus visually or using AF confirm which can be a bit fussy and being an 'A' lens I seem to be able to use both Av and Tv mode which is great. It does seem very sharp w...
Posted by mikew on 24/11/2007 - 16:43
Low-light AF: DA* 16-50 vs DA18-55
[quote:dc355518e4="ChrisA"]Optical qualities and AF quietness and speed aside, would you expect the ability of the K10D to get AF lock in poor light to be better with the 16-50, purely because of its wide-open aperture being F2.8 rather than that of the much slower 18-55? Yes. Ok, supplementary qu...
Posted by George Lazarette on 18/11/2007 - 13:19
Low-light AF: DA* 16-50 vs DA18-55
Its ability to focus quickly, and to find focus in low light, was one of the justifications for my buying the lens. I think it's going to have to go on my wish list then. Once I realised (talk about a flash of the bleedin' obvious :roll:) that for AF purposes, the camera 'sees' at the lens' wid...
Posted by ChrisA on 18/11/2007 - 14:08
Low-light AF: DA* 16-50 vs DA18-55
I think that is the biggest advantage, the DA 16-45 F4 and the DA 18-55 F3.5~5.6 are both fine for landscapes as you'd normally stop down to F8-11. Where they really fall down is in low light where they are just impossible to use. I can only use my A28F2.8 and A50F1.7 indoors without a flash let alo...
Posted by Tyr on 18/11/2007 - 14:16
Low-light AF: DA* 16-50 vs DA18-55
Its ability to focus quickly, and to find focus in low light, was one of the justifications for my buying the lens. I think it's going to have to go on my wish list then. That's the easy bit. I have a DB5 convertible and a castle in a loch on my wish-list. Paying for them is another matter. O...
Posted by George Lazarette on 18/11/2007 - 18:31
Low-light AF: DA* 16-50 vs DA18-55
I want that lens too... but at a cool $1000.00 cdn, I'm afraid I'll have to make do with my canon g5 and pro one as they have both active and passive af and can focus in total darkness.....
Posted by Don on 18/11/2007 - 20:46
What lenses should Pentax make?
Not all would agree, but there are a couple I wish they'd bring back... How about the 1.7AF Tele Converter to start (theyy're getting harder and harder to find...) I know a lens + TC is never going to be as good as a prime of the TC'd length, but for convenience, it's pretty easy to give up a sto...
Posted by Classvino on 21/11/2007 - 14:38
Pentax Star 16-50 & 50-135 Lenses
I got a 50-135mm a week ago. I tested it in low light condition at 2.8 and in daylight at other apertures: back focus, autofocus is not accurate even on SEL mode, totally soft at 2.8. myspace.com/lunacalor the first 5 are taken at 2.8 all focal length with 50-135mm and autofocus. The others are ...
Posted by Substitute on 28/11/2007 - 18:15
Pentax Star 16-50 & 50-135 Lenses
I got a 50-135mm a week ago. ........................... totally soft at 2.8. .....................................I am considering returning it frankly! Strange - Ben finds it brutally sharp :?: :? http://www.myspace.com/lunacalor well the second pic speaks for itself: if you can find ...
Posted by Substitute on 29/11/2007 - 07:05
Pentax Star 16-50 & 50-135 Lenses
well the second pic speaks for itself: Looks like camera shake to me :? The sharpest point is her skin (compare to her hand which is definitely OOF, and so also to the back of her head). Yet, that sharpest point is blurred. I can see there is detail in the skin though. What was the tech specs...
Posted by MattMatic on 29/11/2007 - 08:56
Pentax Star 16-50 & 50-135 Lenses
well of of the other pics have been taken between 1/15 and 1/30 handheld so I am assuming that if this was possible with an smc 100mm or 50mm at 2.8 it should also be possible with a Star lens... Anyway as I am mostly doing concert shots I chose a lens at 2.8. Now if the lens cannot do the job it...
Posted by George Lazarette on 29/11/2007 - 09:52
