Search results for 'back focus' - page 985
70mm Limited or DA* 50-135
Diecast ballast weights to make it feel expensive? :lol: That's the word; "feel". The D7000 body is only made for half out of magnesium, they somehow forgot the back :wink:
Posted by Anvh on 20/07/2011 - 20:34
70mm Limited or DA* 50-135
Diecast ballast weights to make it feel expensive? :lol: That's the word; "feel". The D7000 body is only made for half out of magnesium, they somehow forgot the back :wink: When Nikon users fall over, they fall face first? :lol: It's a well-known fact that people associate weight with value. I r...
Posted by Dangermouse on 20/07/2011 - 23:27
SMC-M 20mm f4 - scratched front element
A lens hood should stop most of the problems. Be careful using flash if it bounces back it will cause flare. It would be better if the scratches were in a diamond pattern that would make the lens work like a starburst filter.
Posted by Algernon on 15/07/2011 - 18:40
DA limited lens case
Nice one Managarm. Could you say where you bought the case? I tried to get one previously although couldn't find them in the UK. Even SRS came back to me saying it was a non-UK product:shock: Still looking out for one though... Thanks
Posted by matwhittington on 15/07/2011 - 19:53
Sigma vs Tamron
I was thinking of getting the Sigma 18-250mm DC OS HSM because it would replace 2 lenses, the 18-55 and 70-300 Tamron I have, but the more I look in to it the more I wonder am I doing the right thing, the shop I'm buying it from will give me the full value back for my Tamron as I only bought it from...
Posted by Beermonster on 15/07/2011 - 21:05
Pentax 18-135 not recognized
I don't have any experience of using Aperture. A quick hunt found some very old posts in the Aperture forum of people complaining about problems reading the lens type in the exif data but I can't find anything recent. In my experience if you are having problems with the contacts on the lens it us...
Posted by GlynM on 16/07/2011 - 19:38
SuperTakumar105 vs SMC105... which one goes ?
Hi Guys Almost painful to type the subject line :D Like, why sell either for goodness sake... The answer being K-5 or even K-3 at the rate I am raising funds Can I present my pros and cons and invite any kind response The Takumar is sweet in Av as I focus wide open and flick it down to sh...
Posted by Transit on 16/07/2011 - 11:47
SuperTakumar105 vs SMC105... which one goes ?
Thanks for the reply :) I have had them both out for a run today . Thing that strikes me first is the long minimum focus I'd sell the Super Takumar if I had to get rid of one. I find the M42 adapters too fiddly and also my K-m's light meter doesn't like them - with all K lenses I get accurat...
Posted by Transit on 17/07/2011 - 06:52
SuperTakumar105 vs SMC105... which one goes ?
Thanks Matt, Yes I have resorted to that method in the past :) The previous 'repair' has put the rim back into alignment, it's just that they seem to have used pliers to do it:shock: I'm leaning towards keeping it and flogging off the Takumar as per advice above :) cheers Pete
Posted by Transit on 18/07/2011 - 22:12
SuperTakumar105 vs SMC105... which one goes ?
Yep tragic how they do that ... I dented my K50/1.2 but had the experts ping it out and glad I did. I did the empty filter ring trick when I got it back. Had tried a shaped wooden drift and also a press with inside and outside shaped jaws. Practice runs on a junk lens were revealing. I think you ...
Posted by Transit on 19/07/2011 - 13:26
SuperTakumar105 vs SMC105... which one goes ?
Practice runs on a junk lens were revealing. Ah, perhaps not such a good idea then. I had thought it would maximise the contact area between drift and lens, but admittedly my understanding of the geometry of threads dates back to my school days...
Posted by sorted78 on 20/07/2011 - 08:22
SuperTakumar105 vs SMC105... which one goes ?
I'd love the preset version, those babies in Av are sweet :) Just cut the aperture lever off any 'M' lens and you can use it like a pre-set with Av :wink: Up to f/5.6 it's as bright as most zooms so no need to open up. At f/8 open up to f/5.6 to focus and then back to f/8. Sometimes you can f...
Posted by Algernon on 19/09/2011 - 13:04
What is the sharpest zoom lens that you have used?
DA12-24mm, for such a wide angle it really does produce very sharp images - reviews suggest it outperforms the Pentax prime lenses in the same range, I've never compared but I can well believe it Simon I had both the 12-24mm and the 15mm and sold the 15mm because, lovely little lens that it was to ...
Posted by lemmy on 17/07/2011 - 14:34
What is the sharpest zoom lens that you have used?
Yes because the sigma 24 is much smaller, cheaper, and with much nicer manual focus. As for the kit lens being a paragon of optical quality - pffft! It's 'okay' - let's leave it at that.
Posted by Pentaxophile on 17/07/2011 - 16:18
What is the sharpest zoom lens that you have used?
Yes because the sigma 24 is much smaller, cheaper, and with much nicer manual focus. As for the kit lens being a paragon of optical quality - pffft! It's 'okay' - let's leave it at that. I started a new thread about the IQ so's not to clutter this up.
Posted by dougf8 on 17/07/2011 - 16:51
What is the sharpest zoom lens that you have used?
It might not be that bad for 18mm, there's a hell of a lot more detail in the frame with a wide angle and pixel peeping doesn't really work. You get the opposite with a telephoto, because you can see eyelashes etc. you think this is a sharp lens. I bought a Sigma 10-20mm and wasn't too happy wit...
Posted by Algernon on 17/07/2011 - 20:53
Sigma 50 1.4 from Microglobe
I bought a Sigma 50mm f1.4 from Microglobe in Bloomsbury a couple of weeks ago, decent price at £315. On getting it home I did what I normally do with new lenses and shot a sequence of pix of a neighbour's rooftop with my K5 and the new lens wide open and the focus adjustment from -10 to +10. The...
Posted by lemmy on 17/07/2011 - 12:15
Sigma 50 1.4 from Microglobe
How would the AF be calibrated on the lens itself? surely the camera is the device deciding when focus is achieved and turns the barrel until that is satisfied? Am I missing something?
Posted by Smeggypants on 17/07/2011 - 17:11
Sigma 50 1.4 from Microglobe
Yes. It does that with contrast AF, as in Live View. With phase AF it measures the difference between the out-of-focusness as seen by two sensors and calculates how much to tell the lens to move the focus. If the lens says it has got there it doesn't always mean it is perfectly focussed.
Posted by karma mechanic on 17/07/2011 - 17:32
Sigma 50 1.4 from Microglobe
Unfortunately, according to various testers there are focus problems with this lens too. Must be something to do with the wide aperture, I suppose. here you go, read the first two parts. http://toothwalker.org/optics/spherical.html
Posted by Anvh on 17/07/2011 - 17:38
