Search results for 'back focus' - page 1135
Lens calibration shop
Unfortunately we don't live in a perfect world and calibrating a zoom is at best a compromise. I always aim for an 'average' focal length and get it right for that. I still can't understand why people get obsessed with 'calibration'. With DA lenses all the relevant focusing parameters are in the le...
Posted by Smeggypants on 03/06/2014 - 01:11
Lens calibration shop
I actually tried the dottune method last night, will do it again today since light wasnt that good indoors, I must say its pretty accurate and its much better than testing on focus charts. focus confirmed all the way from +4 to +10. dont know how much above +10 it will confirm. it will need to go al...
Posted by schnitzer79 on 03/06/2014 - 09:05
DA 300 AND F1.7 AF ADAPTOR
When attached to my 5iis the lens doesn't focus at all so I had to get it close and let the TC take. Very good results with the DA*300
Posted by SteveEveritt on 29/05/2014 - 18:25
DA 300 AND F1.7 AF ADAPTOR
The DA* 300 doesn't autofocus when used with the 1.7x AF adaptor. The adaptor does all the focusing (the adaptor doesn't have the SDM contacts, so the lens essentially becomes manual focus). Because the focus range of the AF adapter is limited you have to focus the lens to approximately where you wa...
Posted by weinelm on 29/05/2014 - 18:36
DA 300 AND F1.7 AF ADAPTOR
I thought that in the absence of sdm contacts the lens would work on the screw drive as it does on my K110d. Never mind onward and upwards:D I think you must be mistaken. The 1.7x AF adapter can't possibly focus the lens fitted to the front of it on any camera because there is no screw drive on th...
Posted by Mannesty on 30/05/2014 - 15:18
DA 300 AND F1.7 AF ADAPTOR
I thought that in the absence of sdm contacts the lens would work on the screw drive as it does on my K110d. Never mind onward and upwards:D I think you must be mistaken. The 1.7x AF adapter can't possibly focus the lens fitted to the front of it on any camera because there is no screw drive on th...
Posted by Smeggypants on 31/05/2014 - 05:43
DA 300 AND F1.7 AF ADAPTOR
I thought that in the absence of sdm contacts the lens would work on the screw drive as it does on my K110d. Never mind onward and upwards:D I think you must be mistaken. The 1.7x AF adapter can't possibly focus the lens fitted to the front of it on any camera because there is no screw drive on th...
Posted by geordie01 on 31/05/2014 - 10:59
Extension Tube
Extension tubes are not lenses. They have no glass in them. Therefore they do not change the magnification you get from the lens you use. Consequently they don't change the exposure either. The only thing they do is allow whatever lens you're using to focus closer than it can without the tub...
Posted by ChrisA on 02/06/2014 - 13:02
Extension Tube
Extension tubes are not lenses. They have no glass in them. Therefore they do not change the magnification you get from the lens you use. Consequently they don't change the exposure either. The only thing they do is allow whatever lens you're using to focus closer than it can without the tub...
Posted by Algernon on 02/06/2014 - 13:17
Extension Tube
I obviously phrased this wrongly as I'm aware extension tubes are err, tubes ... :lol: I've had a set of bellows for many years but they don't offer auto focus etc like the tube linked. Appreciate if anyone that has one of these would comment as they seem to be pretty good. Think it said somewhere i...
Posted by xbow on 02/06/2014 - 14:31
Extension Tube
Your Tamron will already focus to 1X (1:1) which means it will cover a subject 23.7mm x 15.7mm. On the K-5 you can also safely crop. A 25mm tube (if my rough calcs are right) would give you 1.25X or a subject field of 19mm x 12.5mm not a big gain. 12.5mm diam. flower instead of 15.7mm flower :s...
Posted by Algernon on 02/06/2014 - 18:45
Wildlife lens quandary
Afternoon all, I have recently posted a 'wanted' topic for a 50-500mm Sigma HSM lens. This lens of course is fairly rare in 'used' form and this may be a good indication as nobody is prepared to lose it from their setup. My budget is fairly limited (max. 450-500) and this also makes things sl...
Posted by mmawson on 02/06/2014 - 12:18
Wildlife lens quandary
Just re-reading this thread and I remembered an example image I posted a while back that demonstrates the quality of the Sigma 150-500. I think this was at 150mm focal length, but the lens is good all the way up to around 470mm: And a very heavy crop of the stopwatch: Hope this help...
Posted by davidstorm on 04/06/2014 - 12:26
Wildlife lens quandary
Afternoon all, I have recently posted a 'wanted' topic for a 50-500mm Sigma HSM lens. This lens of course is fairly rare in 'used' form and this may be a good indication as nobody is prepared to lose it from their setup. My budget is fairly limited (max. 450-500) and this also makes things sl...
Posted by mayday on 04/06/2014 - 13:47
DA 20-40 Limited
Just sold mine a couple of weeks ago after selling my 21mm and 40mm ltd lens, as like you I wanted a all in one quality lens. The lens line all Ltd lenses is beautifully built and the IQ is ok not as sharp being a zoom over primes, but not bad at all, the reason it had to go is the AF, it's bad, ...
Posted by MattyH on 07/06/2014 - 13:58
DA 20-40 Limited
I took it on a backpacking trip to Armenia in March, whilst I normally just kick around with the 31mm. It's light, and produces great images but as all would suggest it's not as good as the primes, and I never had to focus on fast moving things due to my photography subjects so that's not something...
Posted by chaude on 07/06/2014 - 14:35
Zoom lens comaptibility with Pentax *istDS
There are a few Pentax lenses that don't have the screw-focus connector and are SDM only. Just offhand I think the 17-70mm and 18-135mm are perhaps the only ones so far. They can be used, but will be manual focus only. Auto exposure is not a problem with any of the modern lenses and indeed with a...
Posted by johnriley on 07/06/2014 - 15:00
Zoom lens comaptibility with Pentax *istDS
For a low-cost option, look at Sigma. 70-210 / f4-5.6 in Pentax KA mount. Yes, it has the A setting. Screw-drive auto-focus, plus a good sized ring for manual focus. We are talking about £30 here. I used one on my MZ50, K100, K200, and then it had an attack of fungus. It went to someone here who...
Posted by DoctorJeff on 07/06/2014 - 15:38
Advice for a wildlife newbie
I have been thinking for a while and having seen some stunning photos on here, I thought I would try my hand at a bit of wildlife photography, I currently don't own any long lenses and the last one I did own was the sigma 135-400mm some years ago. My number one thought was to buy the DA 300mm f4,...
Posted by MattyH on 11/06/2014 - 11:32
Advice for a wildlife newbie
Thanks David also, now what do I do? How much are you prepared to spend to start on your wildlife adventure? Regards David Ha ha, as little as possible, I suppose I thought I could budget around the £600-£700 mark, as this was my sigma 18-35mm f1.8 money, but that's a lens I want and not need. ...
Posted by MattyH on 11/06/2014 - 22:53
