Search results for 'back focus' - page 703
LBA Strikes again! Tamron 90mm Macro
Went over to SRS today to have a play with a few Macro lenses, get an idea of how they work / magnification levels, differences with focal lenses etc. Was initially shown the Sigma 70mm whilst another customer was looking at the Tamron. It just happened that a previous customer had been in earlie...
Posted by Unlocker on 19/03/2008 - 21:55
LBA Strikes again! Tamron 90mm Macro
Went over to SRS today to have a play with a few Macro lenses, get an idea of how they work / magnification levels, differences with focal lenses etc. Was initially shown the Sigma 70mm whilst another customer was looking at the Tamron. It just happened that a previous customer had been in earlie...
Posted by Clarky on 20/03/2008 - 04:12
where to buy lens hoods online
do their own range of rubber hoods, scroll to the bottom of the page. These screw onto the filter thread and, being rubber, can be popped back if not wanted.
Posted by beakynet on 20/03/2008 - 14:04
50mm @ F1.7
Having read on another thread that fast lenses have a poor resolution at the edges when wide open, I fished out my old 50mm and took a few at F1.7 to see what it performed like. This one is of my gravel drive and the cat IS MEANT TO BE OUT OF FOCUS, I just wanted the to demonstrate the lenses extrem...
Posted by MX veteran on 20/03/2008 - 15:58
50mm @ F1.7
Unfortunately not a good picture to test lens sharpness - the f1.7 aperture means that little of it is in acceptable focus. Try a landscape shot at infinity or a newspaper closer up, but in the latter case make sure camera and subject are completely parrallel.
Posted by johnriley on 20/03/2008 - 16:43
50mm @ F1.7
Having read on another thread that fast lenses have a poor resolution at the edges when wide open, I fished out my old 50mm and took a few at F1.7 to see what it performed like. This one is of my gravel drive and the cat IS MEANT TO BE OUT OF FOCUS, I just wanted the to demonstrate the lenses extrem...
Posted by iceblinker on 20/03/2008 - 17:17
Sticky Aperture Blades
Thanks for your input everyone, I have decided to send back for the refund
Posted by Promark on 26/03/2008 - 08:22
Anyone got £3k spare?
It is the 5 metre minimum focus distance that puts me off, as well as the £90 postal charge :!:
Posted by Hyram on 23/03/2008 - 08:43
Sorry (no sticky) - FA or F on K series
There are five types of body for these purposes: 1. K/M/LX types - manual or aperture priority auto 2. A/P types with shutter priority and program modes which rely on the aperture ring for aperture priority - this includes most early AF bodies and the MZ3, the MZ5 and the MZS as I recall 3. Lat...
Posted by amilner on 24/03/2008 - 19:15
Sorry (no sticky) - FA or F on K series
A quick run-through of the types: SMC Pentax (often known as K series), the first K mount lenses made 1975-77 Pentax-M, second generation K mount lenses introduced with the ME and MX Pentax-A, the first series with Auto aperture contacts, introduced with the Super A. Pentax-F, the first to us...
Posted by Dangermouse on 25/03/2010 - 09:06
Sorry (no sticky) - FA or F on K series
Plus the unique AF 35-70 which only works with the ME-F (highly unlikely you'll come across one of those and D-FA lenses which are "optimised" for digital but still cover full frame. K. and if you do come across one at a price you consider reasonable, buy it and never let it out of your sight! :l...
Posted by Dangermouse on 25/03/2010 - 14:34
Sorry (no sticky) - FA or F on K series
and if you do come across one at a price you consider reasonable, buy it and never let it out of your sight! :lol: [snip] hulking great battery box under the barrel for the 4 AAs which power the AF motor. [snip] I bought one a few weeks ago but when it finally arrived from South Africa via a member...
Posted by womble on 25/03/2010 - 20:10
Sorry (no sticky) - FA or F on K series
That's interesting - I thought it looked a bit cramped for 4 AAs in there. So you end up with a camera that takes 16 batteries of three different types! :lol: You still have a 28-70mm f2.8 anyway - I think that's the fastest lens in that range Pentax have offered? It surely wouldn't be too hard t...
Posted by Dangermouse on 25/03/2010 - 20:27
Sorry (no sticky) - FA or F on K series
Oops, I keep quoting the wrong range for that thing - it is indeed 35-70mm! Could try ebaying it as a spares or repair, with the rarity value you'd probably get back what you paid. I've seen some truly mad prices paid for broken gear before now.
Posted by Dangermouse on 25/03/2010 - 21:02
135-400 or 100-300 and teleconverter
I upgraded from the 135-400 to the 100-300 (+ tc) at the beginning of last year, principally for air show use, and I have never looked back. The 135-400 is an ok lens, but the 100-300 is superb with very little drop off in IQ when fitted to the sigma 1.4x TC. Neil
Posted by javam on 28/03/2008 - 19:59
MTF autoexposure data in Sigma lenses
Do any of you know whether Sigma lenses include the "Modular Transfer Function" (MTF) data on-chip for the Pentax mount? Modern Pentax lenses do include this data and my Pentax MZ-S can use it. I asked Sigma UK but they haven't gotten back to me :-)
Posted by hoshisato on 28/03/2008 - 19:42
Argos
I don't think I've ever gone into an Argos and had them actually have the item I wanted in stock. Though you can check and reserve at the store of your choice online. And it really works. I bought my K100D Super there a few months back at the best price in all of Europe. Not to mention they are just...
Posted by rparmar on 31/03/2008 - 23:26
New Walkabout lens recommendation
I haven't used a 16-45, but I would just mention that in low light (a church interior), a DA* 16-50 with its SDM focussing and wider aperture should focus a lot faster than the 16-45. And to be honest, f4 is not what I call fast, for a wide-normal lens. Furthermore, the 16-50 may have had mixe...
Posted by George Lazarette on 01/04/2008 - 08:31
New Walkabout lens recommendation
I haven't used a 16-45, but I would just mention that in low light (a church interior), a DA* 16-50 with its SDM focussing and wider aperture should focus a lot faster than the 16-45. And to be honest, f4 is not what I call fast, for a wide-normal lens. G A good point. I had missed the repl...
Posted by Hyram on 01/04/2008 - 08:34
New Walkabout lens recommendation
Furthermore, the 16-50 may have had mixed reviews, but I think that is because one or two people have had problems that have been magnified by the internet effect. I know what you are saying here about the Internet effect. But far more than "one or two" people have had this problem. One of...
Posted by rparmar on 01/04/2008 - 12:43
