Search results for 'back focus' - page 1107
F & FA lens focus speeds
On the 50mm lenses as you get wider apertures the focus throw increases.
Posted by cabstar on 19/10/2013 - 12:18
The new Pentax DA Wide zoom seems good...
I noticed on the LCE secondhand page they have two 50-135 lenses for sale. One is the Pentax 50-135 SDM which is £599. The other is a Tokina 50-135 for £299. Obviously the Pentax has SDM but i would much rather have the reliability of the screw drive on the Tokina and save £300. But alas the Tokina ...
Posted by McBrian on 22/09/2013 - 18:28
50-200wr misses auto focus
hello.....i own a k20d , when used with a 50-200mm wr lens , i find this does not auto focus properly , especially when pointing to a subject in the horizon. have any forum members had similar issues? regards Nadeem
Posted by theonenadeem on 30/09/2013 - 02:23
50-200wr misses auto focus
Does the lens manually focus on infinity?
Posted by G1DRP on 01/10/2013 - 21:52
50-200wr misses auto focus
do you mean it hunts, or doesn't focus? WR 55-200 with quick shift shouldn't hunt too much but it depends what you are pointing it at. I had the 55-300 and that hunted but only when pointed at the sky.
Posted by Lancer3397 on 02/10/2013 - 09:44
50-200wr misses auto focus
I pointed at the horizon. the red dot does not appear. the lens does rotate( not sure if this is front and back focussing) but the view thru the viewfinder is out of focus.
Posted by theonenadeem on 07/10/2013 - 01:52
50-200wr misses auto focus
does the focus ring manually rotate to and past the infinity marking?
Posted by dpm on 07/10/2013 - 06:51
50-200wr misses auto focus
Are focusing on the sky or a horizontal line? In either case the camera won't be able to focus.
Posted by gartmore on 07/10/2013 - 07:16
Tamron 28-75 new or used?
Yeah that's what make me think. The German lens has 12 months warranty, but sending it back to Germany can be annoying.
Posted by sebas77 on 01/10/2013 - 22:27
A bit sad to see this...
I'm not sure it's so sad. There's been more positive development around the K system since Pentax was sold to Ricoh, as well as improvements in other product lines (better Q body, finally a decent high end compact with the MX-1). The real commitment to develop and build on a somewhat neglected b...
Posted by JonSchick on 07/10/2013 - 12:56
A bit sad to see this...
I really don't mind if a good quality K mount lens comes in a box with Ricoh on the front - they used to sell loads of great K mount film cameras and it's good for us to have them back. The quality of the products is what matters, rather than the badge (ditto the rear LCD of the K-3). Agreed, so lo...
Posted by JAK on 07/10/2013 - 13:03
What lens you using for astro?
Trivia: The effective focal length of the Hubble telescope is ... 57600mm and is f/24.0 http://space.jpl.nasa.gov/msl/QuickLooks/hstQL.html However it's not a Pentax Model or available in K mount so better not say any more! If I could afford the delivery charges I'm sure convertion wo...
Posted by petrochemist on 18/10/2013 - 17:08
Landscape Photography - A new dawn....
Last week I ended up in Stormont Buildings Belfast to receive my award for first prize in an amateur photography competition. Suffice to say I was and still am over the moon. My first love is wildlife but I cant help reaching for my 18-55 kit lens to capture the odd land and seascape. I have as...
Posted by QuestionableCarrot on 21/10/2013 - 19:39
Voigtlander on pentax
One thing you'll notice straight away is that these lenses don't focus anywhere near as close as we're used to. Even worse is the 135mm Dynarex, with a close focus of 13 feet. However, they were good lenses, especially the Septon, so probably worth a go.
Posted by johnriley on 23/10/2013 - 18:26
35mm & 50mm plastic-fantastic vs 40mm Limited?
The 40mm is great, small(definitely a pocket-able lens even with the lens hood), very fast focusing, slightly telephoto on APSc. The 35mm is light but larger, does not come with a lens hood. I have not used the DA50 but I like the Pentax 50's, nice portrait focal length on digital. I'm sure yo...
Posted by doingthebobs on 25/10/2013 - 21:08
35mm & 50mm plastic-fantastic vs 40mm Limited?
I don't have experience with any of the primes in question but I do think that the 35 & 50 are the best options. I have various 35, 40 & 50 lenses so I'm familiar with the focal length options, just not the specific lenses. I have a lot of manual film cameras so prefer lenses with aperture rings. ...
Posted by johnha on 26/10/2013 - 00:20
DA* 50-135 SDM autofocus problems.
Some time ago I bought a Pentax DA* 50-135mm lens through Ebay. The seller advertised it as being perfect optically and cosmetically but with a slow, hesitant and erratic autofocus. Naturally I was able to get it at a very good price, and have used it as a manual focus lens.. Recently I had s...
Posted by grahamcoad on 28/10/2013 - 15:12
DA* 50-135 SDM autofocus problems.
Seems to be a common problem! Have just sent my DA*200 to Johnson's with the same problem - erratic and slow autofocus. Price £150 + VAT. Should get it back within 10 days. Hopefully the repair will last a while!
Posted by cgproudfoot on 30/04/2014 - 18:23
DA* 50-135 SDM autofocus problems.
Seems to be a common problem! Have just sent my DA*200 to Johnson's with the same problem - erratic and slow autofocus. Price £150 + VAT. Should get it back within 10 days. Hopefully the repair will last a while! Unusual for any of the primes to have SDM problems, the 16-50mm and 50-135mm are the ma...
Posted by Mike-P on 30/04/2014 - 19:13
DA* 50-135 SDM autofocus problems.
I've had a number of lenses and bodies repaired over the years and all have come back as good as new, bodies have had mirrors, sensors and focus screens cleaned lenses have all been cleaned out and recalibrated for prices not much more than a service. DSLRs and lenses are so complicated now I don...
Posted by cabstar on 30/04/2014 - 19:43
