Search results for 'back focus' - page 699
Don't you wish you had a Canon
They had one of the lenses at their stand at Focus a few years ago... Was able to read the menu in the cafe a few hundred metres away.... :roll: :D
Posted by Pwynnej on 21/02/2008 - 12:54
Magnification of a lens
Magnification of a lens I'm some what mystified as to how Pentax works out the magnification of its lenses... For the DA* 50-135 zoom the angle of view is quoted as 31.5 to 11.9 degrees, magnification as 0.17x and minimum focus distance as 1.0m (specs from http://www.pentaxslr.com/lenses/lens_...
Posted by Bob and his Pentax on 21/02/2008 - 12:11
RE: Out of the two.....
I have the Tamron and like it very much, myself and others have posted a few pics here before. A lot of people wrongly give them a bad press; they need to be used with care: solid robust tripod and head (probably weighted down), mirror lock-up, and almost certainly a UV filter (30.5mm ones fit behin...
Posted by gartmore on 22/02/2008 - 20:31
RE: Out of the two.....
The Tokina shots look pretty damn good to me so I guess there's not much to choose. You certainly do have to be careful with the focus, but in good light mirror lock up isn't vital. No miiror lock here
Posted by MX veteran on 22/02/2008 - 23:41
Pentax SMC-M 400 F5.6
I just went into town to look around and found a slightly dusty but otherwise perfect M400 F5.6 lens in a second hand shop (they also have a website). I know there were a few people on here looking for a 300mm or longer manual lens a while back. I was really tempted to get it but can't really aff...
Posted by Tyr on 22/02/2008 - 16:26
Pentax SMC-M 400 F5.6
I just went into town to look around and found a slightly dusty but otherwise perfect M400 F5.6 lens in a second hand shop (they also have a website). I know there were a few people on here looking for a 300mm or longer manual lens a while back. I was really tempted to get it but can't really aff...
Posted by ChrisA on 22/02/2008 - 16:41
2 x Converter
Remember the old saying: "There ain't no such thing as a bad macro lens". Look out for an old manual-focus lens from Pentax or Ricoh or Tamron (especially) and you should be OK. G
Posted by George Lazarette on 23/02/2008 - 18:51
Wide Angle Lens
Thanks for all the info and links to other threads. I have an oportunity to buy a lens whilst in the US in the next month or so. Would the warranty cover it despite coming back to UK? Cheers M
Posted by martinspence on 24/02/2008 - 18:33
Wide Angle Lens
The Sigma 10-20mm is corrected for sitortion, but the Pentax 12-24mm is much better in this respect, almost perfect in fact. Not according to Photozone's tests - unless I am misunderstanding them. It should be noted that Photozone are focusing on a chart of 120x80cm . which with a 10mm (or 12mm) len...
Posted by amilner on 25/02/2008 - 17:05
Wide Angle Lens
It should be noted that Photozone are focusing on a chart of 120x80cm . which with a 10mm (or 12mm) lens means they are pretty close to it - and WA lenses often 'barrel' more at closer focus. Thanks, that's a very good point. These sort of lenses are normally used at normal veryday distances, not cl...
Posted by johnriley on 25/02/2008 - 17:23
Wide Angle Lens
It should be noted that Photozone are focusing on a chart of 120x80cm . which with a 10mm (or 12mm) lens means they are pretty close to it - and WA lenses often 'barrel' more at closer focus. Which makes the results of both even more impressive. And they do both look very good indeed compared to &q...
Posted by iceblinker on 25/02/2008 - 17:23
Wide Angle Lens
... but then I'm not rich :cry: Being rich is a state that can quickly meet its end when shopping new gear :( As i know only too well, i keep reaching for my back pocket to check if wallet is still there, Its so thin these days :lol:
Posted by Clarky on 27/02/2008 - 01:55
Tokina 11-16mm F2.8 - will it become a DA*?
I thought at first that using the 12-24mm and 24-90mm together would be a good prospect, but it wasn't. Funny that... it's different things for different people! I tried to stick with the 12-24, 16-45, 50-200 combination (thinking I might go for the DA* at some point) but found that I was often want...
Posted by MattMatic on 26/02/2008 - 13:48
Tokina 11-16mm F2.8 - will it become a DA*?
I thought at first that using the 12-24mm and 24-90mm together would be a good prospect, but it wasn't. Funny that... it's different things for different people! I tried to stick with the 12-24, 16-45, 50-200 combination (thinking I might go for the DA* at some point) but found that I was often want...
Posted by Pwynnej on 27/02/2008 - 08:36
Sigma 70mm , F2.8, EX DG MACRO
Sigma state that the minimum focusing distance is 25cm. Surely that's OK. Using a 135mm with 65mm worth of ext. tubes I can focus down to about 36cm which leaves more than enough room to be comfortable. What about the Sigma 105mm macro as an alternative (or anything else for that matter) ?
Posted by MX veteran on 25/02/2008 - 22:00
Sigma 70mm , F2.8, EX DG MACRO
Sigma state that the minimum focusing distance is 25cm. Surely that's OK. Using a 135mm with 65mm worth of ext. tubes I can focus down to about 36cm which leaves more than enough room to be comfortable. What about the Sigma 105mm macro as an alternative (or anything else for that matter) ? Well.......
Posted by Malo1961 on 25/02/2008 - 22:09
Sigma 70mm , F2.8, EX DG MACRO
Sigma state that the minimum focusing distance is 25cm. Surely that's OK. Using a 135mm with 65mm worth of ext. tubes I can focus down to about 36cm which leaves more than enough room to be comfortable. What about the Sigma 105mm macro as an alternative (or anything else for that matter) ? On a Pen...
Posted by George Lazarette on 25/02/2008 - 22:10
Sigma 70mm , F2.8, EX DG MACRO
Sigma state that the minimum focusing distance is 25cm. Surely that's OK. Using a 135mm with 65mm worth of ext. tubes I can focus down to about 36cm which leaves more than enough room to be comfortable. What about the Sigma 105mm macro as an alternative (or anything else for that matter) ? On a Pen...
Posted by Clarky on 05/03/2008 - 03:09
Sigma 70mm , F2.8, EX DG MACRO
It will depend on the sort of macro work you want to do. If I were copying documents I might want a 50mm. But for most other applications a 100mm would be better. I'm not sure about the 200mm having never used one but I would expect it would be excellent for small animals/birds/flowers/bugs. I'm ...
Posted by distudio on 06/03/2008 - 00:51
Testing the 'new' used SMC P-F 70-210/4-5.6 ED
I sold one a few weeks back for 110 £....so the deal was ok. I'm still wondeirng if we live in the same country......so wet over here ;)
Posted by Nimitz on 27/02/2008 - 07:02
