Search results for 'back focus' - page 734
Lensbabies
struggling to understand the lensbaby principle...interested in macro. would be interested in any experience in using the G3 lensbaby, please Firstly, Lensbabies *aren't* macro lenses. You can buy "macro" adaptors for them but these are just close-up filters that attach to the front in the same way...
Posted by hefty1 on 20/11/2008 - 14:42
Lensbabies
You need to understand what makes large format cameras different than 35 mm cameras to understand the whole tilt, shift, swing movements and how that affects the ways lights goes from the front lens element to the film plane. 35mm, and hence our dlsrs are VERY limited in controlling focus, perspect...
Posted by Don on 20/11/2008 - 14:47
Lensbabies
can't be that bad...alot of wedding photogs use em. acquired taste i suppose. I get great shots with my Pentax 85 soft focus lens...and am proficient with photoshop...so I can't justify spending money on lensbabies.
Posted by Don on 20/11/2008 - 17:25
Adaptor for Nikon lenses?
The adaptor in the link above uses an optical element to achieve infinity focus, which I'm sure will degrade image quality. I have a different adaptor which doesn't have an optical element and as a result doesn't preserve infinity focus (it's like a short extension tube). However, it's fine for p...
Posted by Reuben0 on 20/11/2008 - 08:02
Tamron
like all lens makers, they make gems and they make lemons. I have old Tamron Adaptall 90mm SP Macro and 300mm F2.8 SP lenses. Both are very fine pieces of glass which work a treat with my K10D now that I have the KA mount for them. Back in my film days I briefly owned a cheap and nasty Tamron ...
Posted by Mongoose on 21/11/2008 - 08:31
Tamron
Yes I agree, the 70-300 does suffer from Purple Fringing, but I use PSPx2 which has a PF removal feature, This seems to work fine. Managed to post image, thanks for help there. By the way, Jessops had this lens on offer for sixty odd quid not so long back. Cliff.
Posted by Cliff-P on 21/11/2008 - 11:45
Tamron
Tamron 70-300: Very good, except for excessive purple fringing at high-contrast situations. The other problem I had with the Tamron 70-300 is that it is the only lens I have where the front rotates with focusing. This causes problems when fitting or removing the hood. I found that if I forgot to put...
Posted by GlynM on 21/11/2008 - 15:46
Tamron
...This causes problems when fitting or removing the hood. I found that if I forgot to put the camera into manual focus I could end up forcing the AF drive chain. I therefore stopped using it because I was worried that I might damage the camera. So glad I'm not the only one :lol:
Posted by hefty1 on 21/11/2008 - 20:33
Because You're Worth It
A fast prime would work, but won't be essential if you want to use flash or when the available light is bright enough to allow a fast shutter speed even with a relatively slow lens. Try Tv mode and a high ISO setting. It's nice to have a fast prime anyway, though. The Pentax-A 50mm f1.7 is commo...
Posted by iceblinker on 23/11/2008 - 19:19
Because You're Worth It
Just to add one extra point to Nathan's excellent post. The trade off with fast lenses is the narrow depth of field. You might get an extra couple of stops using f/1.4 BUT, if you are relatively close to your subject (e.g. the baby photograph) you may well find that such a narrow area is in focus ...
Posted by womble on 23/11/2008 - 21:57
Because You're Worth It
Just to add another little twist... You could use a faster lens to achieve a higher shutter speed. However, the flip side is that opening up the lens (e.g. to f/1.4) gives you an unbelievably shallow depth of field. If your subject is moving as well that will almost certainly yield out-of-focus s...
Posted by MattMatic on 24/11/2008 - 09:24
Because You're Worth It
With some luck and skill, sometimes f2.8 will be enough to get enough depth-of-field and the moving subject in focus. It will allow a faster shutter speed - and that is what you need if you don't want to (or can't) use flash, and the available light is not bright enough otherwise. The subject ma...
Posted by iceblinker on 24/11/2008 - 09:45
Because You're Worth It
No, it doesn't. In that specific case it is probably the Auto-Focus tracking system, and in case of not bright light, the high ISO performance, up to ISO 2000 for example on the nikon D3 is perfectly usable, and gives 3-4 extra stops. Lens Aperture value is constant, as much as shutter spee...
Posted by nathanever82 on 24/11/2008 - 11:21
Stacking
As you'll be using a reversing ring then the mount on the lens won't matter, so you could save a bit of money by going for lenses that fit in the "good-but-generally-unwanted" camp. Two candidates spring to mind with 49mm filter sizes. The first would be the Helios 44-4. A russian built 58mm f2 l...
Posted by hefty1 on 24/11/2008 - 18:39
Dust in my newer lenses
I bought a K10D in May after 2 years of hard saving and am really pleased with it - I dont have very much in the way of spare funds so I stuck with the kit DA18 -55 lens and bought a cheaper sigma 80-200 (around £85)to go with it. I keep the lenes in the camera bag with some little bags of silica ge...
Posted by selectcase on 24/11/2008 - 11:17
Dust in my newer lenses
I take it that you keep the rear lens caps on? Annoying as it will be it will have no effect on image quality. Manual lenses probably feel better because they are made from metal and not plastic, tho focus action feels light and flimsy on auto ficus lenses to allow a little motor to turn them.
Posted by gartmore on 24/11/2008 - 12:03
Pentax 55-300 really good price!
Same price and cash back as SRS at £199.00 incl postage. SRS is a Pentax pro centre giving 2 years warranty instead of the 1 year available from stockists like Clifton Cameras.
Posted by Mannesty on 25/11/2008 - 16:04
Compact Zooms
I didn't keep copies of the images, I'm afraid, but did compare a Samsung (same as Pentax) 50-200mm to an older manual-focus Pentax A 70-210mm f4 on the same camera. The 70-210's image quality was good generally, but not as sharp as my 50-200's - most noticeably and definitely with a subject at 1...
Posted by iceblinker on 25/11/2008 - 22:41
Amazed with FA 50mm F1.4
I had the chance to handle a FA 50mm 1.4 today. After using the SMC-A 50mm F1.7 and other old MF lenses and the newer AF lenses, I was convinced that no new AF could come close to the feeling of the old MFs. After trying the FA I still think the same, but I'm amazed about how nice the focus ring fel...
Posted by edumad on 27/11/2008 - 01:08
Amazed with FA 50mm F1.4
edumad, I have manual screw mount 50mm 1.4, 135mm 2.5, 50mm 4.0 macro etc. I recently bought a 31mm FA Limited, and its manual focus ring feels like these good old gems. Therefore, I ASSUME all Limiteds would have the "feel". Enjoy your lens - if it is like my Super Takumar 1.4, you're in f...
Posted by Mac on 27/11/2008 - 02:09
