Search results for 'back focus' - page 1024
How much dust is too much?
I just bought a second hand lens from the auction site and it was listed as being in "very good condition". It has arrived and does look to be in a reasonable state externally but examining the inside it looks like there is a fair amount of dust. I managed to take a photo which illustrates it ...
Posted by eddyc on 26/01/2012 - 22:07
How much dust is too much?
Thanks. I'll try testing at F4. I'll be interested to see what happens. It is really odd because the lens looks totally clear from some angles but not others. My kit lens is clear though so that should be ok. I'm beginning to think that I might send it back anyway if I can find another that isn't...
Posted by eddyc on 26/01/2012 - 23:02
How much dust is too much?
If I recieved a lens with that amount of 'gak' on it I'd deffo be sending it back...
Posted by DaveHolmes on 26/01/2012 - 23:29
How much dust is too much?
I wonder if it has been taken apart - not sure how so much dust could get in it otherwise, unless it's been used in a hot dusty environment like a desert or very dry country. Send it back if you can get a refund. Regards David
Posted by davidstorm on 26/01/2012 - 23:53
How much dust is too much?
I think you paid good money for the lens and so should find a better one. Send it back.
Posted by Still27 on 27/01/2012 - 20:37
How much dust is too much?
I often sell lenses on ebay and would not think that lens acceptable, unless described as dusty. Send it back, you should get the price and the outbound postage back within the ebay terms, the return postage you must pay.
Posted by robbieclark on 29/01/2012 - 19:47
€250 for macro lens-help please
I bought mine for macro but find I use it for much more. It's a great lens and you have got it for a song! As with all lenses, a hood is good protection, shades the front element to stop loss of contrast from side light and makes the lens look cool. It can stop you bumping into things when doing...
Posted by doingthebobs on 28/01/2012 - 20:48
Digiscoping
[quote:3496ace15f="Don"]I think digiscoping is fine, but you'll get better results with a second hand telephoto lens. used sigma 400 with the kr would beat the image quality of even the best scopes for about the same money. I'm not sure that is not all true Don. I've seen killer shots where you ca...
Posted by fritzthedog on 29/01/2012 - 12:50
DA21 correcting ?
No idea sorry Steve. I'm going back to raw therapee and the gimp. Can't stand the depressing grey UI in LR.
Posted by Transit on 30/01/2012 - 19:28
60 - 250 mm or 300 mm ?
I had exactly this quandary so I tested them side by side. The 60-250 is a little slower to focus than the 300 and is not quite as sharp, wide open it is softer at 250 than at 220/230 which is where you should be and then crop to the equivalent FL - it will be sharper. Which to buy depends on yo...
Posted by Frogfish on 30/01/2012 - 21:29
sigma 170-500 or 150-500?
If it were the DG it would have been a very good price but it's still pretty decent for the APO version if it's in good nick. Put it this way, you will almost certainly get your money back (and probably even make a small profit) should you not get on with it. The 150-500mm is the better lens with...
Posted by Mike-P on 30/01/2012 - 17:54
sigma 170-500 or 150-500?
have a star 200 2.8 and I need about any appropriate image quality as time at 400-500 mm The Sigma 50-500mm is good .. but not that good. I have the old version, there is now a newer one out with inbuilt OS but after comparing the two I have to say that (for me at least) it wasn't worth doing the...
Posted by Mike-P on 01/02/2012 - 14:31
sigma 170-500 or 150-500?
Don't know anything about FD lenses but If you are looking at manual focus what about something like a A* 300mm f2.8 and 1.7x teleconverter? Gives you 500mm f4.5 with semi AF. Quality is very good. by , on Flickr by , on Flickr Wide open at f4.5 by , on Flickr
Posted by Mike-P on 01/02/2012 - 15:11
Using a Manual Focus lens on a K10D
Hello, You may have already had this question on the forum in the past so please forgive me for reposting the enquiry. Is it possible to use an old manual lens on a K10D and obtain the correct exposure using a lens such as a Pentax-M or M42 mount lens. Which obviously don't have any electronic co...
Posted by Yecora99 on 30/01/2012 - 21:04
Using a Manual Focus lens on a K10D
Yes you can use old M42 lenses on the K10D Ist item you need is a M42 to PK adapter (ebay have cheap imports which work OK - slight problem with some lenses not focusing on infinity, but not all have this quirk) True Pentax ones are available but cost more. 2nd thing to do is to set Using A...
Posted by Frogherder on 30/01/2012 - 23:38
Using a Manual Focus lens on a K10D
Seconded as above :D I now use mf lenses more often that af ones. For m42 lenses I use the camera in av mode and the camera constantly keeps up with the metering and is usually spot on. The focus confirmation indicator (green light centre/ bottom of the view finder) is also pretty accurat...
Posted by Stuey on 31/01/2012 - 12:40
Using a Manual Focus lens on a K10D
I haven't used M42 lenses, but use M and K lenses often. In the 'custom' menu: 'Using aperture ring' - set to 'permitted'. 'Green button in manual' - set to 'Tv Shift'. Now with the camera in 'Manual', simply pressing the green button will (hopefully... more or less...) set the correct shutte...
Posted by Pentaxophile on 31/01/2012 - 18:13
Using a Manual Focus lens on a K10D
Agree with the comments about, M lenses are superb!
Posted by AndrewA on 31/01/2012 - 18:50
F or FA
Thanks John, I rely on the focus confirmation to help me. I have been testing my 55mm f2 screw lens from original SP1000 and the results are very sharp but it's too much of a fiddle to mount. I am guessing that a 1.4 would be much better for low light and bokeh but would it be as sharp as th...
Posted by Pikaholic on 31/01/2012 - 13:29
Samyang 14mm f2.8 experience
I can't comment on the Samyang, but I used the Pentax 14mm DA f2.8 for several years and I can certainly recommend it highly. :) The Pentax DA 14mm f2.8 would have been an interesting option for me, but the Samyang has a great appeal in its low price. In Norway the DA 14mm costs twice the price of t...
Posted by bjolester on 01/02/2012 - 15:37
