Search results for 'back focus' - page 1140
Pentax
I don't mind if it was able to focus beyond infinity but with the 50-200 it can't move beyond that point even though the body tries to and so it fails to get a focus lock and refuses to take a picture unless I set it to manual focus.
Posted by golfdiesel on 31/07/2014 - 21:24
Pentax DA 645 28-45mm f/4.5 ED AL SDM AW SR
I have received the following response from a product manager at Ricoh Imaging: "Thanks for your email. As soon as I get a response regarding the aperture issue I will forward it. I will resend the request when I am back in the office in the morning. Regarding the price of the new lens I am sor...
Posted by Sabrestoof on 22/08/2014 - 11:26
The need for a lens hood.
Mike-P wrote: Only Canon L lenses come with a hood, for all other they are an optional extra. Wow, what a statement. Let me give you a few examples of my Pentax lenses and lenses for Pentax by other makers. 1.)DA 40mm f2.8 with lens hood 2.)Fa 77mm f1.8 with lens hood 3.)FA 31mm f1.8...
Posted by Horst on 05/08/2014 - 15:00
The need for a lens hood.
One for the books - Attended a seminar given by a professional National Geographic Photographer - I asked "besides flare,why use a Lens hood?" he said - The sensor in camera is square, the lens is round. a square hood "helps square " the incoming light. --- was he joking or any technical back up for...
Posted by drobbia on 05/08/2014 - 22:13
The need for a lens hood.
Ah, I forgot my Pentax FA 50mm f2.8, A 50mm f2.8 and 100mm f2.8 macro lenses dis not come with a lens hood, because the lens elements are so far back in the body, that the body acts as a lens hood. The SMC Pentax-D FA 100mm F2.8 Macro WR does come with a lens hood, I have one and it certainly makes ...
Posted by Dave-L on 10/08/2014 - 02:10
The need for a lens hood.
So it does, and of course most or all of the latest Pentax lenses do. The earlier Macro lenses did not come with a lens hood, because I suppose Pentax thought there was no need for it, because the lens elements where very far set back. However this was completely nullified when using a filter. ...
Posted by Horst on 10/08/2014 - 02:28
Cheap multiplier
Hello, I don't care if it will be manual focus only, but what option do I have to buy a cheap but sharp (and with less IQ loss as possible) 2x multiplier for my pentax k5?
Posted by sebas77 on 04/08/2014 - 18:51
Cheap multiplier
Cheap and sharp don't usually sit well with each other when it comes to teleconverters. Why not look out for a Pentax Rear Converter K T6-2X - I have one here that cost me about £40. No electronics, so manual focus and manual stop down metering, but better quality than most of the cheap converter...
Posted by johnriley on 04/08/2014 - 19:03
Lens change
My initial reaction Sancho is that apart from the 'advantage' of not having to change lens, I'm not sure whether there is much more to gain from moving to one of these 'superzoom' type lenses. Personally a lot of the fun of a DSLR is the creative boost given when swapping lenses and using lenses ded...
Posted by McGregNi on 05/08/2014 - 15:26
Lens change
I don't think the 18-270 has WR? I'm looking to trade in the same 2 lenses as well. I'm currently planning to replace with the Pentax 18-135 WR. I'm going to do this, because the 18-135s I've used have been much sharper than the other 2 and the Autofocus being silent is a big draw too. I do a lo...
Posted by wozzo on 06/08/2014 - 02:08
Lens change
The Pentacon screw thread lens can be used, but you'll need a Pentax Adapter K to attach it to your DSLR. It might be better to wait for an SMC Pentax-M 50mm which will attach directly, although still needing manual focus and stop down metering to work. Any K fit lens with an "A" on the aperture ...
Posted by johnriley on 07/08/2014 - 13:05
SR in Lenses
As the sensor size of the Pentax 645Z is roughly 1.7x larger than 35mm-format, full-frame image sensors, perhaps the movement of SR unit is just to great like you state John. Perhaps another aspect is that if they are manufacturing new lenses for the 645Z it makes sense to build image stabilisati...
Posted by Fletcher8 on 05/08/2014 - 17:07
Why was an approx 70mm lens considered ideal for portraits?
Yes to all. All those reasons. The "classic" portrait lens for 35mm film has always been 85mm and fast 85mm lenses have always been stars in the line up of all manufacturers. f/2, f/1.8 and even f/1.4 were commonly made. The wide apertures also meant it was easy to obtain nice out of focus backgr...
Posted by johnriley on 09/08/2014 - 08:04
Break the rules......
It's because your rules are crap :D 1) a good lens is a good lens and a MF lens on APsc is just as good per pixel or per sensor area as it is on MF. It just won't be as good as an equivalent price APsc lens is. 2) yes but a converter doesn't,t degrade MF lenses any more than APsc. 3) and ther...
Posted by LennyBloke on 14/08/2014 - 14:57
I'm in a TIZZ
I use a Tamron 90mm 72b manual focus macro lens and it does the job for me. https://www.pentaxuser.com/photo/user-12248/my-mates-dog-57837 Not that expensive and as good as the DFA 100mm macro as I had one and sold it and kept the Tammy.
Posted by geordie01 on 11/08/2014 - 15:24
I'm in a TIZZ
I don't do a lot of macro (read that as practically none) but I have an old Sigma manual focus 50mm f/2.8 macro for the odd occasions that I do. You can pick one up very cheaply and they perform well as both a macro and general walkabout lens. You have to get very close, though, and if I were more i...
Posted by Aero on 12/08/2014 - 11:14
I'm in a TIZZ
There are some Sigma 50mm f/2.8 macro lenses around and they are apparently very good and go for reasonable prices (maybe 130 with AF, 80 if manual focus). Those would probably be your best bet. The equivalent Pentax lenses would cost more and are probably less common. The one I see for sale most...
Posted by Jonathan-Mac on 12/08/2014 - 15:08
New Toy - K85
Thanks to LennyBloke I now am the happy owner of a SMC Pentax 85mm f1.8, or the K85 as its also called. Pretty much the same size and a little lighter than my Voigtlander 90mm f3.5 APO-LANTHAR. Hopefully one of these two will stay, I suspect it will be the K85. The Voigtlander is VERY well bu...
Posted by hoopsontoast on 12/08/2014 - 21:55
New Toy - K85
I have this lens and totally love it, I just need camera with better aid for manual focusing... it is very nice lens - but getting focus correct is critical - if you do so it is sharper than FA77 Limited. It also render deeper blue tones....enjoy it...and if you don't mind let us know how it compar...
Posted by kingfisher on 13/08/2014 - 10:42
lens change advice
Thanks for that john. i am leaning towards the 18-135 for now with a view to getting the 55-300 at a later date. I really like my A 50mm 1.7 even though it is manual focus. I was actually considering the plastic 35mm and 50mm lenses, but felt i couldnt justify them just for autofocus. Keeping them...
Posted by scarr1 on 12/08/2014 - 23:17
