Search results for 'back focus' - page 1091
Sigma 100-300mm F4 - focusing beyond infinity
I had a Canon mount Sigma 70-200mm f2.8 that I bought for peanuts as the AF was not working, sent it to Sigma who fixed it (that cost about £130) and I'm not kidding, when it came back it was so sharp it was unbelievable. Would be interested to see what your 100-300mm is like on it's return, mine se...
Posted by jeallen01 on 12/06/2013 - 17:45
Sigma 100-300mm F4 - focusing beyond infinity
Update - the lens arrived back from Sigma on Thursday and I may have a chance to try it out over the weekend, but probably next weekend is more likely.
Posted by jeallen01 on 22/06/2013 - 14:53
Help very appreciated on this one
Hi Alistair, interesting to see you posting about this again. There are probably several routes you could take for extra sharpness. Here are a few of my thoughts: - The image posted above is nice, but it is definitely not the sharpest and you could do much better with better quality glass ...
Posted by davidstorm on 27/05/2013 - 18:18
Which one is sharper
The Tamron 90mm f2.8 is indeed a 1:1macro As to sharpness I find the limiting factor is my shaky hands:) The 1st is the Tamron @f2.8 The 2nd is my manual 50mm @1.7 plus 58mm extension tubes In both cases I focussed as close as I could get with the focus on the thin line above the...
Posted by Frogherder on 30/05/2013 - 15:28
Which one is sharper
A lens will naturally project an image that mimics the shape of the elements in terms of where sharpness falls - in other words, the plane of sharp focus is curved. This means the centre could be sharp but the edges out of focus, and vice-versa. Fast lenses tend to suffer more from "field curvat...
Posted by johnriley on 30/05/2013 - 16:00
Which one is sharper
For pictures of food, why not try the humble close-up lens first? Stopped down to f/11 or f/16 it should give excellent results. In terms of focal length a 50mm Macro, if needed, might be better. Normally I would opt for a 100mm Macro but sometimes that does leave us too far away. Why not a Pent...
Posted by johnriley on 30/05/2013 - 16:02
Which one is sharper
Most manual focus ones go to 1:2, but the addition of an extension tube will take them to 1:1 with no problem. 1:1 is extremely close - it seems very close for food?
Posted by johnriley on 30/05/2013 - 16:18
Which one is sharper
The Sigma 50mm F2.8 Macro you asked about is a 1:1 lens and it's a very good one too. You might find a manual focus one for around £80, this would do the job very nicely. I prefer the Sigma 105mm DG EX Macro, not only because of the extra working distance for macro, but also because it is a superb...
Posted by davidstorm on 30/05/2013 - 23:41
Which one is sharper
Thank you all. I think I was misunderstood. My budget for a proper 1:1 macro lens is higher (around £200), but if I was to compromise and go for an older, manual 1:2 macro lens then I wouldn't want to spend more that around £100. Thank you again. I think I will experiment with the tubes a little...
Posted by davidstorm on 31/05/2013 - 18:26
Which one is sharper
I'd highly recommend the Vivitar 55/2.8 manual focus macro, which doesn't come up terribly often but sells for less tan £100 when it does. Unusually, it's a true 1:1 lens, nicely made and great IQ. Can't remember whether it was made by Kiron or Komine - but it was one of those two.
Posted by JonSchick on 31/05/2013 - 23:28
Looking to try something old
I love old lenses but only have primes when it comes to manual focus:D
Posted by Stuey on 01/06/2013 - 18:35
Looking to try something old
The US/other-forum has a pretty comprehensive lens reviews section... A good resource... I tend to stay away from manual-zooms as well... The Pentax-F (although AF) series of zooms seem to be quite sought after; moreso than the later FA-versions in many cases... If you are wanting to try manu...
Posted by DaveHolmes on 01/06/2013 - 23:13
Looking to try something old
My Tamron Adaptall 135mm f2.8 is a useful little item - well made and solid. It came from a secondhand dealer with a K-Mount adapter already fitted, so I had no worries there, although I guess these adapters are easily found? Its not a true macro, but is kind of constructed like one with a big m...
Posted by McGregNi on 02/06/2013 - 14:17
Teleconverter choice
I am looking to buy a 2 X teleconverter to couple up with my Sigma 150 - 5OOmm lens connected to my K200D. The Sigma 2 X DG for Pentax is close on 300 Euros which is a tad on the expensive side for me. Given the gear I am thinking of coupling it up to and that I am happy to accept only manual foc...
Posted by gibsondj on 02/06/2013 - 19:53
cheap macro lens
I was advised AF so that if I am taking a shot of an insect it will be faster to focus before it moves away
Posted by Riachsion on 03/06/2013 - 13:43
cheap macro lens
I'd be tempted to get one with a limiter (like the Tamron) to avoid the lens racking back and forwards through the entire range, the Tamron works very well as a short telephoto also. John
Posted by johnwhit on 03/06/2013 - 15:22
cheap macro lens
I was advised AF so that if I am taking a shot of an insect it will be faster to focus before it moves away Was that advice from someone who doesn't actually take photos of insects? With practice you'll be able to manually focus on an insect quicker than most AF systems. The key is to get the ...
Posted by Mannesty on 03/06/2013 - 23:27
cheap macro lens
I was advised AF so that if I am taking a shot of an insect it will be faster to focus before it moves away Was that advice from someone who doesn't actually take photos of insects? With practice you'll be able to manually focus on an insect quicker than most AF systems. The key is to get the ...
Posted by Mike_L_76 on 04/06/2013 - 02:19
cheap macro lens
A few thoughts: - Forget about AF for both flowers and insects. It's much easier and more practical to set your focus and slowly move a but backwards or forwards accordingly. AF on macro lenses is always very slow as it is because of the 'long throw' of the lenses. - The 90mm Tamron is very nice ...
Posted by joostdh on 04/06/2013 - 19:59
cheap macro lens
I was advised AF so that if I am taking a shot of an insect it will be faster to focus before it moves away No. AF cannot provide the degree of focus accuracy you need for macros. What you do instead is take your time and study the insects. See where they land. If they are pollen carriers then se...
Posted by rparmar on 05/06/2013 - 14:56
