Search results for 'back focus' - page 1096
Manual focus zooms on dslr question
Sorry - old age on my part the DC210 was a 1 megapixel camera. I gave it to one of my neighbours who still has it and uses it.
Posted by jamieallan on 16/07/2013 - 10:46
ditching the zooms - the prime only experiment
Although the weather seems to have taken its toll on the K5 (see separate forum entry!), I had set myself a challange. Could I survive a 2 week holiday with just primes. Not wanting to restrict myself to a 3 lens set-up, I chose to restrict myself to one small crumpler bag. Previously capable of ...
Posted by Evel79 on 15/07/2013 - 23:15
ditching the zooms - the prime only experiment
I would go one further and say I enjoy using manual primes more than anything, if only focusing was easier on the digital. There's only so many times I can make the wife repose when she's still a tad out of focus despite all my efforts with the lens opened up... I know I could buy a new viewfinde...
Posted by Evel79 on 17/07/2013 - 21:14
DA*300 Is quite handy!
Good close focus, good sharpness, reasonable bokeh, what's not to like:?: All hand held and wide open, with the new K5IIs at a local bit of wild meadow, very early this morning:shock:
Posted by jules on 17/07/2013 - 11:43
DA*300 Is quite handy!
Very nice :D Cheers Stuey, it feels realy good to be back with Pentax, after all the gear I've had I've only really liked two Digitai SLR's those being the Sony A900 and the K5. The Sony is a boat anchor, and to be truthful feels like a dinosaur but that viewfinder, oh that viewfinder, the K5 just ...
Posted by jules on 18/07/2013 - 05:41
Tokina 90mm f2.8 Macro Price ideas?
I happened across a mint Tokina 90mm f2.8 macro lens (Pentax K mount) with original 1:1 extender some time ago now. Obviously this is a fabulous lens but I don't get much time for macro work and my eyes aren't up to much in the manual focus territory so I'm considering selling but have no idea on a...
Posted by Unfounded on 17/07/2013 - 14:22
Fastish AF lens for portrait
The 50-135 makes for a very nice portrait lens. I do like to use a tripod though at shallow depth of field to ensure the plane of focus stays just so and I do find the size of the lens makes it rather cumbersome on a tripod.
Posted by DrOrloff on 21/07/2013 - 10:25
Best best for 28mm "A" lens
This one is also well worth considering 'Vivitar 28mm f/2.8 Close Focus they come in a PKA mount and are usually reasonably priced....
Posted by Defragged on 21/07/2013 - 16:13
Best best for 28mm "A" lens
The PKA version of the Komine made Vivitar 28mm f/2.8 Close Focus should probably be on the list too. I have heard that it's not so hot wide open - and the 'A' version seems quite rare - I don't think I've seen any recently on Fleabay. Andrew
Posted by andrewk on 21/07/2013 - 17:05
Best best for 28mm "A" lens
You can sometimes find the Sigma 28/1.8 lens in manual focus. This is the older, compact version - excellent lens.
Posted by smc on 22/07/2013 - 00:52
Best best for 28mm "A" lens
I always found the focus throw of the 28mm sigma too short for accurate focus. It is nice when you di get focus right though.
Posted by cabstar on 22/07/2013 - 13:27
DA* 16-50mm
I'd like to solicit opinions on this Lens, with all my current wheeling and dealing I've ended up with two Pentax 17-70'S & a SINGLE limited DA35 F2.8 MACRO, I want to run myself a comparison between the 17-70 and 16-50, I love the 35 macro but some of you may know I've been down that road before. :...
Posted by jules on 22/07/2013 - 09:54
DA* 16-50mm
Did it free up? Yes, couple of quick manual turns of the focus ring sorted it.
Posted by Mike-P on 27/07/2013 - 22:10
DA* 16-50mm
Well I'm just beginning that journey of discovery George but my initial findings seem to mimic yours. My idea of a direct comparison with the Pentax 17-70 F4 SDM, may not happen as my "other" 17-70, is currently touring France for a month and the current user has offered me good money for it. Indee...
Posted by jules on 01/08/2013 - 05:01
DA* 16-50mm
Good choice Jules - I've had my DA* for a while and basically it has become my default lens - all the other standard zooms I had have been sold, rendered redundant..... Yes, it has some magic, something my Nikkor 24-120 f4 lacks and I've had the dreaded SDM failure, but it came back from JP absol...
Posted by ilovesaabs on 01/08/2013 - 09:35
DA* 16-50mm
Just got mine back from JP after a 4 month break, apart from a few days in the middle, and it is now better than it ever was. On the K-5iis it seems to be much more reliable when focusing, on the K-7 it was almost never in focus and I kind of fell out of love with it.... but now :wink::wink::wink:
Posted by SteveEveritt on 01/08/2013 - 21:08
Calculating depth of focus
Does anyone know of a simple(ish) formula which would allow me to calculate the probable depth of focus from the distance to the focus point, the aperture setting and any other item that would need to be factored in? Or is the calculation either too difficult to be done with mental arithmetic or do...
Posted by eoinandpaula on 22/07/2013 - 13:10
Calculating depth of focus
What you are referring to is Depth of Field. Depth of Focus is something else entirely and refers to the amount of leeway available in the actual location of the sensor plane. There are depth of field tables in books and no doubt on the web, but if you want a simple "rule of thumb" for landscapes...
Posted by johnriley on 22/07/2013 - 13:19
Calculating depth of focus
I'll leave it your judgment as to whether you consider the formula's simple but have a look at http://en.wikipedia.org/wiki/Depth_of_field Depth of field does indeed vary according to the lens, and the aperture, and how far away you have focused so working this out isn't very practical. Some fol...
Posted by gwing on 22/07/2013 - 13:23
Calculating depth of focus
A good read up is definitely good advice, if just for general knowledge. For critical work you might need to do some maths or use lens scales (if included on yours). But for general photography when you don't want to add too much time to your shooting technique, then the 'hyperfocal' distance appro...
Posted by McGregNi on 22/07/2013 - 14:18
