Search results for 'back focus' - page 637
M lenses and metering options
Well, not getting an intelligable reply from anyone, I performed some preliminary tests. The lens tested was the 50mm f/1.4 M lens. Earliiest results are negative, even with the contact altered, the M lens seems not to be able to use Matrix metering. A 50 f/1.4 A lens has no problem at all, so ...
Posted by Arthur Dent on 13/08/2005 - 01:14
M lenses and metering options
Well, not getting an intelligable reply from anyone, I performed some preliminary tests. The lens tested was the 50mm f/1.4 M lens. Earliiest results are negative, even with the contact altered, the M lens seems not to be able to use Matrix metering. A 50 f/1.4 A lens has no problem at all, so ...
Posted by Kim C on 13/08/2005 - 02:32
M lenses and metering options
I'm more concened with getting the Matrix mode in manual mode. If I set it up right, I could use the lens in manual, just like I do now, but with the fancy Matrix mode. I actually use a Sekonic incident meter for most of my work, but I thought it might be fun to try out the Matrix stuff to see...
Posted by Arthur Dent on 17/08/2005 - 01:42
Manual for SMC Pentax-FA 28-80mm
George/John Thanks very much for getting back to me. I am one of those people who likes having a manual to hand in case of problems! I do, however, have one specific query. I recently bought a *ist DL and I am using the above lens, which I used to employ with my Pentax MZ-30. I know the len...
Posted by Gareth Morris on 05/08/2005 - 09:26
Lens Hood
Kim, Thank you for letting me know where to find lens handbooks on the web. One was not included with my last camera and lens but maybe that is more to do Jessops taking it out of the box than Pentax not proving one! I was not aware you can reverse the lens hood and mount it back over the lens...
Posted by Anonymous on 13/08/2005 - 13:16
Pentax FA 80-320mm F4.5-5.6 vs Sigma 70-300mm F4-5.6 APO DG
I too am in the market for a longer lens for my *ist-DS and I have narrowed my choices down to the new Pentax 50-200mm DA and the SMC 80-320mm. I have a Tamron 28-300mm that I had used on my MZ5n and was never really thrilled with. It is terribly soft on *ist-DS so I will probably shy away from eve...
Posted by photo*ist on 23/08/2005 - 06:11
Pentax FA 80-320mm F4.5-5.6 vs Sigma 70-300mm F4-5.6 APO DG
Strangely (or maybe not), that precisely in candid family shots that I like to use my primes. I have lost a few shots because I couldn't focus quickly and acurately enough in manual, but I have stunning shots I wouldn't otherwise get. Plus, I get the "feel" of the lens, of the focal length (you lear...
Posted by Flink on 24/08/2005 - 15:44
Pentax FA 80-320mm F4.5-5.6 vs Sigma 70-300mm F4-5.6 APO DG
Flink, yes if you have a patient family, primes can no doubt work. But when I'm on my safari I'm not getting out of that jeep for love nor money :) Got the lens this morning, first impressions extremely positive. Nice quick focus, good reach, much sharper at the long end than I expected.
Posted by Slothy on 25/08/2005 - 10:26
Pentax FA 80-320mm F4.5-5.6 vs Sigma 70-300mm F4-5.6 APO DG
Who needs to go on safari, when there's monstrous great aphids like those in your garden :shock: :D Haha that comment just brought back nostalgic memories of 'Honey I shrank the kids'
Posted by Acliff on 26/08/2005 - 08:03
Pentax FA 80-320mm F4.5-5.6 vs Sigma 70-300mm F4-5.6 APO DG
I just took a quick snap in the garden, you can find it . Pic has had no processing, just raw->jpg conversion using rawshooter. Iso 200, f11, exposure of 1/180s, lens at 320mm. Slothy Thanks for sharing that shot with your 80-320mm. It quite sharp and even better when sharpened with USM....
Posted by photo*ist on 26/08/2005 - 08:43
12-24mm DA finally announced!!
Well, there are other lenses that do not have apeture rings and are meant for full frame cameras. The Pentax SMC-FA-J 18-35mm f/4-5.6 AL - Auto Focus Zoom is listed as suitable for 35mm cameras, but what if I want to use it on my MX cameras? Just because I own a fancy digital pro camera doesn'...
Posted by Arthur Dent on 29/08/2005 - 03:26
Which long telephoto zoom?
Tony, something like this might fit the bill - esp. when you take into account the 1.5x focal length conversion on an *ist DSLR. I much prefer Tamrons to Sigmas and there are quite a few available on eBay, not all models are available for Pentax though! If you really want to save money, y...
Posted by Kimbo on 30/08/2005 - 16:25
Which long telephoto zoom?
Well, I've given the Sigma 170-500 its first field test at the WWT in Arundel. Quite please with the results, a crop of a swan displaying taken at full stretch at f13 and 1/1000 at 400ASA printed at 200dpi onto A4 looks pretty good to me at least. Not quite 'you can see every feather' but the day wa...
Posted by amilner on 24/09/2005 - 15:29
My lenses and going digital
You will have to manually focus your A lenses just like you do now, but they will have full functionality with the DSLR. Older M, K and m42 lenses can only be used in Manual exposure mode with a custom function set on the camera. It's like using them on a manual camera like the MX. They will al...
Posted by Arthur Dent on 27/08/2005 - 16:37
My lenses and going digital
You will have to manually focus your A lenses just like you do now, but they will have full functionality with the DSLR. Older M, K and m42 lenses can only be used in Manual exposure mode with a custom function set on the camera. It's like using them on a manual camera like the MX. They will al...
Posted by Juno 60 on 28/08/2005 - 09:56
Mirror lenses
Hi John, thanks for the quick reply. I will investigate by taking it all into my local camera shop. The back lens cover has OM printed onto it, which I assume means it is for Olympus fit cameras. Is the T mount their generic name for their brand, as the K mount is for Pentax? Just to confirm, I am l...
Posted by Anonymous on 28/08/2005 - 12:54
Mirror lenses
If the back is labelled Olympus it looks as though there is already a T mount adapter in place. This just needs unscrewing and a pentax k one putting in its place. A T mount ot t2 adapter amounts to the same thing. They are very simple adapters but this doesn't matter with a mirror lens, which has a...
Posted by johnriley on 28/08/2005 - 13:05
the difference between Macro lenses
Hi. I know most people in these forums favour Pentax lenses but I wanted to see if anyone had an feedback on a couple of the Sigma Macro lenses. In particular I'm interested to know what the practical differences are between the 180mm F3.5 Ex and the 150mm 2.8 Ex? Obviously there are things...
Posted by catterm on 30/08/2005 - 04:44
new Macro lens
In on-going testing a couple of conclusions in a very complex area do seem likely - firstly that prime lenses can be significantly superior on digital and secondly that modern zooms can be much better than older manual focus ones. This is especially true of modern professional quality zooms. Tele...
Posted by johnriley on 09/09/2005 - 23:27
new Macro lens
To clarify, what I found was that there was a useful (significant) difference between the latest high quality zooms, digital designs or not, and much older and relatively mundane prime lenses. So for example the SMC Pentax-A 50mm f2 clearly outresolved the newer 24-90mm and 18-55mm lenses at f8. ...
Posted by johnriley on 11/09/2005 - 00:35
