Search results for 'back focus' - page 708
Macro Lens (and Tamron 1.4X Teleconverter)
I am looking for advice on a decent macro lens. Should I be looking at the Tamron 90mm, Sigma 105mm or the Pentax 100mm? Or is there a better alternative (not tubes as I really want it for close up out and about). Also, I have a Tamron 1.4X teleconverter, how would this work (if at all) with a ...
Posted by Mongoose on 02/05/2008 - 09:26
What to buy... decisions, decisions...
I went for the Sigma 18-200 becuase the Tamron 18-250 (and I believe that the Pentax is based on that one) was too noisy and slow on focus and also a be stiff on manual focus! I tried the Sigma 10-20 once and it is a great lens. Thing is you already have 18mm so going wider will give you a lot t...
Posted by beakynet on 01/05/2008 - 15:52
What to buy... decisions, decisions...
Well, back from the Lakes. Fabulous weather, sunny most of the time (although that often meant boring light). Very pleased to have chosen the 10-20 - it was hardly off the camera. I haven't even nearly finished sorting through the pictures, most of which are pretty rubbish (just snaps, as in ...
Posted by ChrisA on 16/05/2008 - 13:04
How to use manual lens sigma 35-135 (for pentax K ) on K10D
I am guessing that the camera is in Autofocus mode. As such, the camera won't fire till the subject is in focus. If you turn to Manual focus, it should work. There is a focus assist function where you press the shutter button half way and then twist the focus on the lens and the camera will ind...
Posted by beakynet on 01/05/2008 - 23:22
Screw Mount
Ok, thanks for the info, will have a play when it arrives and see whats what. I also won this last night http://cgi.ebay.co.uk/ws/eBayISAPI.dll?ViewItem&rd=1&item=230247770197&ssPageName=STRK:MEWA:IT&ih=013#ebayphotohosting I presume I can mount this on the K10D ok? I just th...
Posted by Mike-P on 06/05/2008 - 13:23
Finally ordered a 31mm Limited!
As the title says, finally got round to ordering a 31mm Limited today! Decided after a lot of thought to take the plunge and order it from abroad because the cost difference was quite a lot! Price paid brand new was £410 inc. postage, and worked out that if I do get caught for import duty (7%?) ...
Posted by Unlocker on 05/05/2008 - 14:03
Finally ordered a 31mm Limited!
I got a 31mm Ltd today and am totally blown away! I shot off around 50 shots on my K20D in a matter of 30 minutes or so in my back garden (nothing of any artistic merit) and am well impressed. Sharpness, contrast and colour are outstanding. You won't be disapointed. Worth every penny!
Posted by Ken McChesney on 08/05/2008 - 22:18
DA* lens tests - technique and advice appreciated!
After totally gutting and revamping my shop non stop 7 days a week for the last 5 weeks, today I am finally going to get the chance today to properly do some tests with my 16-50 & 50-135 DA*s!! Have brought all my kit to the shop today (inc. our new manfrotto 405 geared head, very nice!), and...
Posted by Unlocker on 05/05/2008 - 14:20
DA* lens tests - technique and advice appreciated!
First and foremost: consistent environment. Not just consistent, but totally static and immutable in all regards other than the lens you are comparing with. It sounds like you will have all of that covered with the mounting and studio environment your have at the shop. RAW v.s. JPEG should no...
Posted by amoringello on 05/05/2008 - 21:39
DA* lens tests - technique and advice appreciated!
Will be shooting a wedding on Aug 2nd for a friend. How's this for a coincidence? On Saturday I did my first ever wedding for one of my customers at very short notice (sole photographer), and the reception was a bbq back at his house in..... YOUR ROAD! :shock: :shock: First time I'd been in a...
Posted by hefty1 on 05/05/2008 - 23:57
DA* lens tests - technique and advice appreciated!
The brick wall appears to suffer from camera shake. If the camera was on a tripod, be sure to use the 2 second timer to lock the mirror up. If not, thee's your answer. :-) The focus test sheet looks fine to me. The center focus spot in camera is an + shape that extends roughly the size of the...
Posted by amoringello on 06/05/2008 - 01:24
DA* lens tests - technique and advice appreciated!
Just FYI, this is what I found to be the locations of focus points on my K10D. This was before the repair, and although the focus is more centered now, I believe the basic layout/shape is still the same. I was rather surprised at the long shape of all but the center focus spot. I also thought all...
Posted by amoringello on 06/05/2008 - 01:32
DA* lens tests - technique and advice appreciated!
The brick wall shot was on the tripod, SR off, mirror up 3 sec delay with IR Remote, so I guess that before we call it a bad sample, do the same shot again several times? The more I look at it, I just can't tell. Must be the odd patterns of the brick. Could just be soft focus. Also, f2.8 is n...
Posted by amoringello on 06/05/2008 - 01:43
DA* lens tests - technique and advice appreciated!
For the focus test chart try taking the picture again using your 43mm @f.1.9 - the smaller the depth of field the easier it is to check BF/FF problems. It looks like yours is sharp from 6mm (front) to 14mm (back) on the one you've posted which suggests it's back focussing by a very small amount (pr...
Posted by hefty1 on 06/05/2008 - 11:00
How accurate are the distance markings on lenses?
So I point my new Sigma 10-20 at a brightly lit, contrasty subject, centre spot AF as usual. It focuses quickly on the K10D, with focus confirmation (yes - green hexagon, not red spot). However, the subject is about ten feet away, and the lens indicates distinctly under three. I haven't really...
Posted by ChrisA on 06/05/2008 - 00:17
How accurate are the distance markings on lenses?
Assuming no mix up between m & ft.... I suspect the scale is fine but the lens is not focused correctly. AF with this lens is unreliable towards the 10mm end. With such a wide angle, detail at the focus point can appear so small that the camera, like human eyes & brain often, can't judg...
Posted by iceblinker on 06/05/2008 - 01:19
How accurate are the distance markings on lenses?
Like a lot of modern lenses, the temperature thing is why it is able to focus beyond infinity. This is a double-edged sword. One one hand it's good that you will always be able to focus as far as infinity. On the other, it makes manually focusing at infinity more difficult. It's so much simple...
Posted by iceblinker on 06/05/2008 - 22:09
An 18-250 or the new 55-300 ?
I compared the 18-250 and 55-300 to my FA 80-320 at the SRS open day a couple of months back. The 18-250 is impressive considering its range, but ultimately no match for the 80-320 in terms of sharpness. I would consider the 18-250 as a lens which is ideal for holiday snaps where you're really ...
Posted by Mongoose on 08/05/2008 - 14:06
Shopping for old lenses in and around Edinburgh
there are many in Hong Kong shops too, but the postage is more and there is a risk of tax (though on a £2 item, it would be minimal) Importing goods from outside the EU into the UK via the post: NO tax is payable if your total purchase is less than £18 (including postage), or £36 if it is a gift. ...
Posted by iceblinker on 11/05/2008 - 17:31
Shopping for old lenses in and around Edinburgh
Can someone explain how to tell whether an M42 to K adapter provides infinity focus? (I don't know).
Posted by iceblinker on 11/05/2008 - 18:25
