Search results for 'back focus' - page 692
SMC 50mm A - 1.7 WOW !!
Check that the focus mode switch on the camera is set to manual - otherwise it will only take a photo when the subject at the focus point is exactly in focus (useful under some circumstances but generally a pain). Thats the answer I was looking for Tony, silly me !! I really am impressed by the...
Posted by simonkit on 04/12/2007 - 19:56
Sigma HSM lenses
Now that we have SDM Pentax lens support, does anyone know if Sigma are likely to release Pentax versions of their HSM lenses? It would seem to make some sense. The 50-500mm is available in 3 different HSM mounts, and all seem to be priced about the same, so I would guess the costs involved would...
Posted by Unlocker on 05/12/2007 - 01:28
Sigma HSM lenses
I think one of the problems is that Sigma refuse to pay for the rights to use a particular mount/system and rely on back engineering. How viable this would be with the Pentax system remains to be seen and I doubt Sigma will go to the expense unless there are a lot more K10s sold. Kim
Posted by Kim C on 06/12/2007 - 11:37
mirror lenses Centon 500 - f8???
Tamrons come uo all the time on eBay. I'm watching one at the moment. I bought one last month for £62 inc. P&P and I like it 'cos its so much lighter and easier to handle than traditional lenses. There are downsides; Fixed aperture at f8 Shallow depth of field Bokeh produces strange donut sh...
Posted by MX veteran on 13/12/2007 - 20:57
mirror lenses Centon 500 - f8???
It fosuses way beyond infinity on purpose, so that expansion and contaction of the lens at different temperatures can be compensated for. You just focus the lens visually - the lens does not have to be set at the marked infinity point.
Posted by johnriley on 10/01/2008 - 15:21
mirror lenses Centon 500 - f8???
Why would you need to make this adjustment? You don't if it's within your acceptible limit. If you make the adjustment, it'll focus just a bit closer at the bottom end.
Posted by Mannesty on 10/01/2008 - 19:14
mirror lenses Centon 500 - f8???
Just wondering if you ever got a mirror lens. I purchased a 350mm Tamron mirror back around 1987 for specifically photographing damaged roof structures. It works well with the k10 and is also good for macro work if on a tripod. I have some test images over here http://mierau.ca/lens1.html ...
Posted by almierau on 23/01/2008 - 22:04
more newbie questions - tele converters
if I get a tele converter for my K10 is there anything I need to know or is a tele converter a tele converter? What happens to auto focus lenses? I have a Tamron 70-300 is there one that is particularly suited to that?
Posted by Darkmunk on 07/12/2007 - 21:00
more newbie questions - tele converters
Well first off you will lose a couple of stops of light. And unless the converter has contacts for the AF system, your AF lenses become manual ones. There is an AF converter which turns your manual focus lenses into auto focus lenses (I think you set the lens to infinity and the converter sort...
Posted by Ammonyte on 08/12/2007 - 12:14
nikon to pentax adapter etc.
Typically adapters exist to enable M42 screw fit lenses to be used on a variety of bayonet cameras. When manufacturers introduce new lens mounts they aften offer an adapter to allow the old lenses to be used. Pentax have made Asihiflex to M42, Leica screw to M42, M42 to K bayonet adapters, thu...
Posted by johnriley on 08/12/2007 - 17:36
nikon to pentax adapter etc.
What adapters actually exist for other lenses (I already know about pentax 645 to bayonet, m42 to bayonet and t-mount). Specifically, are there any for nikon, minolta, canon or olympic lenses to pentax bayonet? No, mainly because the relevant register distances don't allow space for an adaptor to be...
Posted by niblue on 08/12/2007 - 18:24
Looking for feedback regarding DA 18-250mm.
Don, if you think that's 'lots' then you should donate some of your clearly colossal lens budget to a more needy cause - namely me!.............To moan thus about a Pentax lens would incur George's ire, for pixel peeping, so be glad it's a mere Tamron you're dissing there......... I didn't think I w...
Posted by Don on 15/12/2007 - 01:48
me super lenses
Hi and welcome to the forum. In general I would say YES you can use the lenses from the ME on the K10. Some will have limitations though. M- models works - but you need to stop them down - before every shot. A - Works well in Av mode or manual. F and FA works as usual. M and A ar...
Posted by Nimitz on 14/12/2007 - 08:14
me super lenses
Hi edwood, welcome to the wonderful world of digital ! Yes, you can use your M lenses on the K10D :) There are some limitations. You have to turn on the ability to use an aperture ring in your custom features, select the lens focal length when you turn on the camera (if you have SR turned on), sh...
Posted by Transit on 14/12/2007 - 09:04
Suggestions
The Pentax 10-17 and Sigma 10-20 are both excellent lenses but very different. I have both and the Sigma is by far the most useful - the Pentax is a superb performer but a fisheye isn't something that tends to get used all the time. On the 90-150mm option there are loads of cheap but good manual ...
Posted by niblue on 14/12/2007 - 12:01
Suggestions
What sort of photography are you intending to do mostly? No lens is pointless unless it is not the right lens for the job in mind. The fisheye you mention will give you some great wide effects but will not be a good choice for classic portraits. If you want cheaper lenses and don't mind putt...
Posted by pschlute on 14/12/2007 - 12:02
Suggestions
I bought the Sigma 105mm Macro a few weeks back. It was around 250£ from new. Having this lens I have discovered it is a fantastic 105mm prime as well as a macro lens. Just an idea - probably not as cheap as the other options... I got the 135mm M - Prime. It's very good too (and cheap) - Just...
Posted by Nimitz on 14/12/2007 - 12:50
Suggestions
If you fancy the challenge have a look for the Pentax M 135 f3.5 which are plentiful on ebay, and the quality of the optics are first class. I can second that. I got a M42 (screw) 135 f3.5 with an auction lot. Its a wonderful little lens . Beautiful smooth focus action, lovely out of focus backgroun...
Posted by Transit on 16/12/2007 - 05:02
50mm 1.7 M aperture question
Bought an SMC 1:1.7 M-50mm for a tenner on ebay. Gorgeous little lens. can't get it to stop down tho'. Is there something I am not doing? I have set the custom setting to 'allow aperture ring' but that's all I can find. Manual focus is fine, it's actually nice to go back to having fine control...
Posted by Darkmunk on 14/12/2007 - 15:52
Filters
Actually reading my one back it looks like I mean 2 jpegs or one raw file. Sometimes you can get away with just the one raw file, but as I always shoot raw, I did mean 2 raw files. :roll: I use a grad so rarely that it suits me more just to do the 2 exposure thing, but it's obviously better for...
Posted by Daniel Bridge on 21/12/2007 - 13:21
