Search results for 'back focus' - page 1812
Manual focus lenses on Pentax K-5 II
There are special screens for some lenses, such as the f/1.2 ones and also the ultra-wides. Equally, long telephotos also have different screens ideally. The first 18mm lens, from Zeiss, had a special pink tinged screen supplied for the Contarex that the lens fitted. indeed, the EE-s screen has b...
Posted by Smeggypants on 21/03/2014 - 00:31
Manual focus lenses on Pentax K-5 II
I wouldn't worry about manual focus lenses on a Pentax DSLR with the standard screen. I wouldn't bother with a cut down screen for another system, you'd have to align it to perfection for any benefit. I'd worry far more about my technique - that is much more likely to be a problem. As for EVFs, I...
Posted by kh1234567890 on 21/03/2014 - 01:08
Manual focus lenses on Pentax K-5 II
There are special screens for some lenses, such as the f/1.2 ones and also the ultra-wides. Equally, long telephotos also have different screens ideally. The first 18mm lens, from Zeiss, had a special pink tinged screen supplied for the Contarex that the lens fitted. Indeed Pentax made a whole ra...
Posted by stevejcoe on 21/03/2014 - 08:18
Manual focus lenses on Pentax K-5 II
There are currently a few screens available for the DSLR range. The difference is that these days most users no doubt use AF and AF systems may have different requirements to the human eye. They can certainly focus more accurately in lower light.
Posted by johnriley on 21/03/2014 - 08:46
Manual focus lenses on Pentax K-5 II
There are currently a few screens available for the DSLR range. The difference is that these days most users no doubt use AF and AF systems may have different requirements to the human eye. They can certainly focus more accurately in lower light. But none of those available from Pentax are optimi...
Posted by stevejcoe on 21/03/2014 - 09:19
Manual focus lenses on Pentax K-5 II
Agreed Steve, they are all AF screens. However, there were a huge number of different LX/MX screens - are none of these adaptable? They don't seem to be available in large numbers though. How about the relatively huge used market of Olympus OM screens? I've had must be getting on for 30 or more o...
Posted by johnriley on 21/03/2014 - 09:39
Manual focus lenses on Pentax K-5 II
John, I agree that there are probably large numbers of LX/MX screens gathering dust somewhere, but I am not so sure that there are so many of the SA3/SA23 designed for use with fast glass are still around. As for Olympus screens I picked up type 13 OM system screen (in box, with fitting tool)fo...
Posted by stevejcoe on 21/03/2014 - 11:26
Manual focus lenses on Pentax K-5 II
kh1234567890, I am really interested to know how you find the ee-s screen with slower glass. Generally, I do use legacy fast/ fastish leneses, probably 70% of the time. However the remaining 30% is with slower lenses. The reports are mixed, with many stating that the screen should be ruled out for t...
Posted by moose on 21/03/2014 - 12:07
Manual focus lenses on Pentax K-5 II
I'm a bit confused with Steve's last comment. As far as I understood AF in a DSLR it uses a separate path to an AF sensor normally situated at the bottom of the camera under the mirror and is not affected by the focus screen. I thought the focus screen is only required for manual focussing and even ...
Posted by jamieallan on 21/03/2014 - 13:34
Manual focus lenses on Pentax K-5 II
You need the Fresnel etchings otherwise the view would be dim at the corners. The screen shouldn't be getting dusty, just be careful to change lenses in a dust free environment (as far as is practical) and point the camera throat downwards whilst doing so. This avoids dust settling or falling into t...
Posted by johnriley on 21/03/2014 - 13:44
Manual focus lenses on Pentax K-5 II
kh1234567890, I am really interested to know how you find the ee-s screen with slower glass. Generally, I do use legacy fast/ fastish leneses, probably 70% of the time. However the remaining 30% is with slower lenses. The reports are mixed, with many stating that the screen should be ruled out for t...
Posted by kh1234567890 on 21/03/2014 - 14:01
Manual focus lenses on Pentax K-5 II
I like the K01 as well David. But the K30 you suggest (and which is also the route I've gone) also has focus peaking and hence doesn't need a supplementary K01 just for manual lenses. Thanks for the clarification Rob. Is the peaking on the K30 the same as it is on the K-01? I understood the implem...
Posted by gwing on 21/03/2014 - 14:23
Manual focus lenses on Pentax K-5 II
You need the Fresnel etchings otherwise the view would be dim at the corners. The screen shouldn't be getting dusty, just be careful to change lenses in a dust free environment (as far as is practical) and point the camera throat downwards whilst doing so. This avoids dust settling or falling into t...
Posted by jamieallan on 21/03/2014 - 15:36
Manual focus lenses on Pentax K-5 II
True Jamie, but at least any dust in the viewfinder is just an irritation. It won't affect the image at all. It happened on SLRs too, in the old, dark days of film. But, as you say, cameras are meant to be used.
Posted by johnriley on 21/03/2014 - 16:10
Manual focus lenses on Pentax K-5 II
Kh1234567890, thanks for the help. It is the focus 'pop' that appeals about the ee-s screen and I fully appreciate the need to shim it accurately. With the standard screen, there is too much room for error. Sure, you can rock focus back and forth and split the difference, but it is still hit and mis...
Posted by moose on 21/03/2014 - 19:19
Manual focus lenses on Pentax K-5 II
Really what I am trying to get a handle on, is whether the darker screen on slower glass ( say down to f5.6) is prohibitive or just a inconvenience. I guess the only way I'll know if 'noticeably darker' with slower lenses is actually 'too dark' for me, will be to give one a try. It is about two t...
Posted by kh1234567890 on 21/03/2014 - 21:42
Manual focus lenses on Pentax K-5 II
I'm a bit confused with Steve's last comment. As far as I understood AF in a DSLR it uses a separate path to an AF sensor normally situated at the bottom of the camera under the mirror and is not affected by the focus screen. I thought the focus screen is only required for manual focussing and even ...
Posted by Smeggypants on 21/03/2014 - 23:45
Manual focus lenses on Pentax K-5 II
I'm a bit confused with Steve's last comment. As far as I understood AF in a DSLR it uses a separate path to an AF sensor normally situated at the bottom of the camera under the mirror and is not affected by the focus screen. I thought the focus screen is only required for manual focussing and even ...
Posted by stevejcoe on 22/03/2014 - 06:49
Manual focus lenses on Pentax K-5 II
[quote:3496ace15f="jamieallan"]I'm a bit confused with Steve's last comment. As far as I understood AF in a DSLR it uses a separate path to an AF sensor normally situated at the bottom of the camera under the mirror and is not affected by the focus screen. I thought the focus screen is only required...
Posted by Smeggypants on 22/03/2014 - 07:13
Manual focus lenses on Pentax K-5 II
Totally agree , my error. Actual AF focusing is not affected. What I mean't to say , was the users ability to see the centre point, due to the frequent darkening of part of the centre of a split prism screen when using slower glass. Personally I wish that there was a European/UK supplier of the c...
Posted by jamieallan on 22/03/2014 - 08:09
