Search results for 'back focus' - page 744
55mm F1.4 SMC or the 50mm F1.4
Thanks for the correction Stefan ;) Yes, a "reversing ring" allows the lens to be mounted back to front straight onto the body. A "coupling ring" allows two lenses to be mounted front-to-front. I've tried all kinds of combinations for macro... and they're all good fun (as long as you can find e...
Posted by MattMatic on 05/01/2009 - 13:29
55mm F1.4 SMC or the 50mm F1.4
but as all the contacts on controll of the lens wont be on the camera you need to do everything manually. That's surely not a big deal but still something that you must know before going into this world. Hi Stefan Thanks very much for reminding about the manual controls but I am sure I can cope r...
Posted by aminstar on 05/01/2009 - 13:41
55mm F1.4 SMC or the 50mm F1.4
Amin, just be careful you don't get carried away with all this reversing lenses and stuff... https://www.pentaxuser.com/forum/topic/Up-close-and-personal-3319/p-0 :shock: :lol: Dan Dan, thanks for the advice, :), only problem is it came a bit too late. Once I embarked down this route see...
Posted by aminstar on 05/01/2009 - 15:11
55mm F1.4 SMC or the 50mm F1.4
As a very cheap alternative toe in the water can I suggest the Vivitar 100 macro f3.5 - I believe it is nicknamed the plastic fantastic as it is indeed made of plastic and you can feel it. However at about 40 quid it's an easy way to see if you do much macro although without the extension ring it...
Posted by mikew on 05/01/2009 - 17:22
55mm F1.4 SMC or the 50mm F1.4
Hi Amin!...........I may not be as experienced as other people on here ,but in my humble opinion,if you want to do Macro go for a dedicated macro lens!.......Either the Pentax 100mm or the Tamron 90mm!.........Ken If I did go for a dedicated macro lens (and I am not saying I am:wink:) wouldn't the o...
Posted by aminstar on 06/01/2009 - 09:08
55mm F1.4 SMC or the 50mm F1.4
If I did go for a dedicated macro lens (and I am not saying I am:wink:) wouldn't the obvious choice be the pentax 100mm one compared to the Tamron 90mm? With the £50 cashback from Pentax the prices end up exactly the same, £299. Or am I missing something here? You'll often hear the phrase (here an...
Posted by hefty1 on 06/01/2009 - 10:41
55mm F1.4 SMC or the 50mm F1.4
That's what I wanted to hear, cheapy-cheap extension tubes although without electrical contacts but that's where the advantage of aperture ring in the 50mm 1/4 comes handy so I can manually set it, right? Yes, absolutely. You probably want to ring around the second hand shops to see what they've go...
Posted by MattMatic on 06/01/2009 - 11:37
55mm F1.4 SMC or the 50mm F1.4
It appears you have a 50/1.4 already. For macro work a 50/1.7 is said to be better as the field of focus is more planar. A 50/1.7 is also sharper from 1.7 to 2.8. Someone has suggested though, that using a lens hood on a 50/1.4 helps a lot to reduce the gap, arguing that the 50/1.7 lenses have a...
Posted by Class_A on 08/01/2009 - 09:23
Cheap Lens for portrair photography
Hi all, I know this question has been asked many many times, and ive read a lot of reviews on this forum over many days to try and make a decision, but I think I need a little help from some of you more experienced users. I have a Pentax K20D with 16-50mm lens, I use this lens for club phot...
Posted by TerminalFunk on 06/01/2009 - 09:25
Cheap Lens for portrair photography
There's always second hand stuff around, especially manual focus: http://www.lcegroup.co.uk/SHdetails.asp?Item=4505 EDIT: Think this is - so no "A" on the aperture and you'd have to do stop-down-metering on the dSLRs. Matt
Posted by MattMatic on 06/01/2009 - 11:29
Lens compatibility - newby just wanting to make sure!
Thanks very much for that John and Steve. Based on my old lenses being 28-80 and a 75-300, that would equate to a 42-120 and a 112-450 then on a k20D, by back-calculating the 1.5 multiplication. I think I will still get both the new kit lenses though as the 50-200 does look very small in comparis...
Posted by nzspen on 06/01/2009 - 14:03
The Three Great Lens Mysteries
Mystery 1: How can different lenses have different FF/BF characteristics on one body? Mystery 2: Why is it not possible to use non-centre AF points with a manual lens? Mystery 3: Why is it not possible to use multi-zone metering with a manual lens? Regarding M1: My understanding of AF i...
Posted by Class_A on 08/01/2009 - 08:59
The Three Great Lens Mysteries
Allow the user to enter an aperture value in Av mode. If it doesn't match the aperture set on the lens, tough. But if it does then you wouldn't need to dial in exposure compensation yourself. This shooting mode allows quicker shooting than "manual" + button press + shutter release. This sort of pr...
Posted by johnriley on 08/01/2009 - 09:50
The Three Great Lens Mysteries
Regarding #2 You can't use auto focus with a manual focus lens. Are you referring to the red dots on the image area? If so, these are not 'focus confirmation' indicators but an indication of the area AF is attempting to focus on and offer by themselves no indication of sharpness, focus confir...
Posted by gartmore on 08/01/2009 - 10:02
The Three Great Lens Mysteries
You can't use auto focus with a manual focus lens. Of course not. I was indeed referring to "focus confirmation". The red indicators are not as unrelated to focus confirmation as you describe them. When manually focusing, they pop up exactly when the AF sensor determines something to be in focus. ...
Posted by Class_A on 08/01/2009 - 10:46
The Three Great Lens Mysteries
You can't use auto focus with a manual focus lens. Of course not. I was indeed referring to "focus confirmation". The red indicators are not as unrelated to focus confirmation as you describe them. When manually focusing, they pop up exactly when the AF sensor determines something to be in focus. ...
Posted by El Dingo on 12/01/2011 - 13:28
The Three Great Lens Mysteries
I agree & fervently disagree why in heavens sake keep on about old lenses when the world has gone digital I have just sold all my 6x7 gear & my 645 stuff to go completely digital. as John said no quote but how will Pentax (as jethro tull) advance if we keep on living in the past. I an A quality le...
Posted by pschlute on 12/01/2011 - 16:51
The Three Great Lens Mysteries
I agree & fervently disagree why in heavens sake keep on about old lenses when the world has gone digital I have just sold all my 6x7 gear & my 645 stuff to go completely digital. as John said no quote but how will Pentax (as jethro tull) advance if we keep on living in the past. I an A quality le...
Posted by womble on 12/01/2011 - 22:31
Confused over lens naming
Hi All I'm really confused at the moment over the naming of Pentax lenses and what the codes mean. Essentially when I'm looking at older manual focus lenses I can't work out which ones have the "A" button to lock the aperture into auto. I know I am supposed to be able to use any pentax K mount (or...
Posted by Donut on 09/01/2009 - 14:53
Confused over lens naming
SMC Pentax (with no suffix) were the original K mount names and are commonly referred to as 'K' series lenses. Then came SMC Pentax-M, -A, -F, -FA, -FAJ, -DA, -D FA, -DA L. 'K' series & -M lenses have no 'A' setting on the aperture ring. -A, -F, -FA, & -D FA lenses have the 'A' setting on the ...
Posted by Mannesty on 09/01/2009 - 15:02
