Search results for 'back focus' - page 538
Image stacking and focus rail
The range of images to be used for stacking are obtained by varying the point of focus on the object. Thus the camera is not moved and the image size remains constant. Which lens do you use for this? Most change length as you adjust focus, which moves the objective lens in relation to the subject. ...
Posted by andrewk on 05/12/2013 - 12:56
Image stacking and focus rail
Gents, many thanks for your replies. Roger, I had wondered if that was the way to do it, but my problem was that went against what I read in the book, so I had discounted it. Andrew, that's good news, I hadn't realised the software could compensate for that. On the subject of CombineZP, I've ...
Posted by handlep on 05/12/2013 - 14:45
Image stacking and focus rail
Focus stacking software compensates for the change in image size as you move the rack/camera/lens forward. It's not a problem. The procedure you describe is probably the most widely used. Keeping the camera/lens still and changing the focus point will also work, and the image size may still chang...
Posted by Mannesty on 05/12/2013 - 14:48
Image stacking and focus rail
Thank you Peter.
Posted by handlep on 05/12/2013 - 14:51
Image stacking and focus rail
It might be worth you having a look at this YouTube video: http://www.youtube.com/watch?v=mzVD95-9YOU It's a bit long-winded, but very informative (for me). Have a look at the section starting from 8 mins onward. Apparently, the best way to shoot is to use a bellows but with the lens fixed an...
Posted by andrewk on 05/12/2013 - 15:12
Image stacking and focus rail
... On the subject of CombineZP, I've just looked at Alan's site, he only lists up to Vista - do you know if it will work on Win8? And, I'm guessing the answer is no ... I have used CombineZP on Win7, 8 & 8.1 without any problems. It can be a bit slow on lower performance PCs but on a PC with grun...
Posted by GlynM on 05/12/2013 - 16:12
Image stacking and focus rail
Thanks Glyn.
Posted by handlep on 05/12/2013 - 16:28
Image stacking and focus rail
I've not done it myself but know a man who does and he recommends starting at the back and coming forwards.
Posted by SteveEveritt on 05/12/2013 - 17:26
Image stacking and focus rail
Hello, If you have a telecentric lens then this doesn't happen, but not many of us do. Good software will handle the change in size, have a look at zerene stacker. I wouldn't recommend moving bellows extension length during a stack but move (camera + bellows + lens) all on a stage. What you don't...
Posted by nass on 05/12/2013 - 20:51
Image stacking and focus rail
Thanks Nass, I'm now having a good browse round your site! :o
Posted by handlep on 06/12/2013 - 13:05
Regrets
So come on spill the beans, what did you part with? ..... John It was my K 28mm f2 :shock: - I found it difficult to use because of manual focus and Green Button shooting, but the photos it produced were superb! I was a bit sad after I parted with my A*85 as well - but the FA*85 more than ma...
Posted by LennyBloke on 05/12/2013 - 14:40
Regrets
I don't think there's one in Pengs Cave ;) but you never know! If you like using manual focus lenses and get the chance to pick up a K28/2 then don't hesitate.
Posted by LennyBloke on 05/12/2013 - 14:52
Regrets
I don't think there's one in Pengs Cave ;) but you never know! If you like using manual focus lenses and get the chance to pick up a K28/2 then don't hesitate. I've been looking for one for a couple of years. One sold yesterday for £420, too rich for me.
Posted by DrOrloff on 05/12/2013 - 15:48
Regrets
My Sigma 105 macro :( I missed mine so much I had to get it back, a fine piece of glass I think everyone should own at some point. Lens I regret....the 21ltd.
Posted by bettyswolloks on 05/12/2013 - 17:44
Regrets
I much prefer my Sigma 105mm to my late DA 100mm. Mainly as if the lens hunts I can limit it the focus on the Sigma but the Pentax noisily goes from infinity to close focus until it locks on! So annoying and I found that clamp switch a waste of time One of the reasons I prefer the Tamron Di 90/2.8,...
Posted by johnwhit on 06/12/2013 - 09:14
Regrets
I am the (very) lucky recipient of LennyBloke's decision to sell the K28 f/2. Having owned it for a short period I am beginning to understand why it is such a special lens. At this time my eyes are okay for manual focus lenses and I am happy with using the green button for metering. At the same t...
Posted by LongTimeLurker on 06/12/2013 - 23:38
Regrets
I regret selling the 'free' (because of cash back) 18-55 WR kit lens I got with the K5. I'm thinking of selling the K7 and including the lens may have made it more marketable. :(
Posted by tyronet2000 on 09/12/2013 - 12:29
A Picture Speaks a Thousand Words
I think it is is the only war where journalists were embedded and not censored. I remember the nightly horrors shown on the news during the Vietnam war. Such things would never be shown now, even without government censorship. Even in my leafy London suburb the Vietnam war had a profound affect on ...
Posted by Gwyn on 05/12/2013 - 12:57
Pentax DSLR Product Guide - enclosed with AP
I noticed Damien mentioning a while back that he personally uses Pentax.
Posted by gartmore on 07/12/2013 - 13:39
buying abroad
Can someone explain the procedure/pitfalls of going somewhere cheap like USA or (you tell me), buying something, throwing away the packaging, using it on your hols and just bringing it home? Or maybe getting someone who lives there to bring it back next time they come home to their family?
Posted by Darkmunk on 07/12/2013 - 19:27
