Search results for 'back focus' - page 1076
SDM failure? help.
I've read that sometimes you can 'bump start' the SDM after a lay-off by manually operating the screw drive with a screw driver or similar. Doesn't help, but I periodically operate my SDM lenses on-camera even though I don't intend using them to prevent this problem. If you fancy a challenge, h...
Posted by JohnX on 11/02/2013 - 13:57
Elements in teleconverters...
Just like it is with lenses there is no guarantee that one with more elements will be better quality, just more complex. That said the additional elements allow the possibility of correcting extra aberrations and where a manufacturer offers both 5 and 7 element models you can be pretty certain that...
Posted by gwing on 06/02/2013 - 10:12
Elements in teleconverters...
[img] they ( Teleplus macro converters) are designed to give 1:1 with 50mm lens what it would do with your macro i do not know. , I have one of these interesting thingies as well. They are sort of like a 2x teleconverter and variable extension tube combined and are designed to not only work as a ...
Posted by gwing on 06/02/2013 - 10:25
Elements in teleconverters...
Tubes all the way, there is nothing between the lens and the sensor to muddy the picture. The key to macro photography is light and you will loose light with either setup but adding the additional glass will harm your images. Pentax A 50mm on 75mm of tubes with contacts and Catch in focus
Posted by SteveEveritt on 06/02/2013 - 20:09
Elements in teleconverters...
Although I answered the poll saying I use one, I also use other techniques and combinations of techniques, most often recently would be stacking lenses (a prime reversed infront of another longer lens). As others have mentioned there are TCs with built in variable extension designed for macro. N...
Posted by petrochemist on 07/02/2013 - 11:14
Elements in teleconverters...
......I think tubes will be a useful addition but for bugs I worry that having to go closer to the subject might be a disadvantage... Is this the case or is my thinking all wrong? You are correct the extension tubes reduce the working distance whereas the tc does not affect the min focus distance. I...
Posted by walt on 08/02/2013 - 08:36
Which Zoom Telephoto Lens
Thanks Stuart. To add to the mix, SRS price for 400 is £499.00 for the 500 £599.00. I really am undecided. I have a DA 55-300, SRS are telling me that the Kenko converter will really struggle for focus with it.
Posted by takuman on 08/02/2013 - 16:01
Which Zoom Telephoto Lens
Thanks to col55555ine I have resolved my own problem. I was aware of the £50.00 cashback on the 150-500 but pessimistic as ever thought I would have to pay £50.00 on top of SRS price and then claim it back from Pentax, bringing the price down to £599.00. Quick call to SRS, no, I pay £599.00 and the...
Posted by takuman on 08/02/2013 - 16:34
Which Zoom Telephoto Lens
Senior moment, the cash back of course is from Sigma, and the delivery wasn't free. But what a cracking price.
Posted by takuman on 08/02/2013 - 17:12
Sigma 18-250 Macro
With the Lens OS switched to ON on the lens and camera body SR switched OFF, as you take a picture (hand held) the image you actually see in the viewfinder stabilises. If you have the lens OS swiched off and the inbuilt Pentax body shake reduction swiched ON as you take the picture the image seen st...
Posted by Patty on 13/02/2013 - 22:01
New Lens box opening instruction video!
Q on the 560mm is no more than a fancy lens cap I'd be more cautious than that because the Q on the back of some telephoto lenses is surprisingly good. It will be interesting to see what the results are like when someobody gets around to trying it out. As the weather gets better we're hoping for ...
Posted by johnriley on 14/02/2013 - 13:47
Cheap Wide Angle Zoom?
Ideally you need to wind your clock back to summer 2009, travel through heathrow terminal 5 and pick up a Samsung SA 12-24 f4 - it's the same as the DA 12-24 but with minor cosmetic differences. Price of the DA12-24 skyrocketed to around £900 in 2010-11 but I, along with a number of members, pick...
Posted by ilovesaabs on 15/02/2013 - 16:13
Pentax F 28 - 80 Macro - Strange problem
I have a strange problem with the 28 - 80mm lens I use on my K10d It's not causing me any great heartache, but I'm curious as to if it is a fault, design, or something else. With the aperture fully open I cannot always get focus lock at 28mm. I can zoom in to about 35m and get lock on the same obj...
Posted by Father Ted on 15/02/2013 - 15:49
Just Got a helluva BARGAIN!
I'm not sure what the fuss is with these. If I'd been offered one for £50 which considering what they go for is a bargain I'd just bung it on ebay. I had one for a while and sold it. Ugly useles piece of kit, image quality poor compared to the lenses without it. Really massivley overated. Autofoc...
Posted by K10D on 17/02/2013 - 11:52
Just Got a helluva BARGAIN!
On my way to the station in Bradford, en-route to that London I stopped off at the city's last camera shop to drop off my A35 2.8 for repair... As some of you know I've been in the market for a TC... They pull out a Pentax-F 1.7 AD converter... Is this the kind of thing you've been looking for? ...
Posted by DaveHolmes on 18/03/2013 - 19:54
Just Got a helluva BARGAIN!
Gonna try and get hold of a Focusrite Scarlet 2i4... It's USB(2) rather than firewire (becoming increasingly unsupported) and has midi i/o as well as 4 outs... I don't/shouldn't need more than 2 inputs (but if I do I still have my old Akai dps12) but midi is a must-have for me... I already have a...
Posted by DaveHolmes on 05/07/2013 - 16:34
50mm 1.7 f smc af
I have both F and A (and also M) versions. AS far as I am aware, the optics are identical. So the only practical difference is the F focuses faster, but I focus more quietly.
Posted by elfer on 17/02/2013 - 17:10
50mm 1.7 f smc af
superb lens, regretted selling mine, but so happy to get it back:D
Posted by ilovesaabs on 18/02/2013 - 11:48
50mm 1.7 f smc af
I bought mine about 20yrs ago, excellent lens, the only draw-back being the focus ring is a little small and under-damped when focusing manually - no more so than other AF lenses though.
Posted by johnha on 19/02/2013 - 00:21
Wedding shooting sugestions!
Hi Petros, John's comments are so right. People skills are paramount: No.1 Speak with the bride and groom as a couple, then with the bride on her own, then the groom on his own. They are the important people on the day. Understand what they want and expect, it is their day. No.2 Speak with both...
Posted by Diopter on 19/02/2013 - 20:08
