Search results for 'back focus' - page 1027
New 560mm minimum focus distance
As mentioned by Alan, "560mm will give you a decent sized shot of a Sparrow or similar at about 5 metres, cut that down to 4 and you'd struggle to get the bird in the frame". Not on a FF you won’t. Ah but the new 560mm is a DA lens, so talking about what it will give on a Full Frame body is pointles...
Posted by fatspider on 10/02/2012 - 01:08
New 560mm minimum focus distance
It was only a general comment Alan, possibly Pentax being the exception. Sigma et al do the needful and make a FF optic for the longer end of the lenses. Still, it will be interesting once it’s released to see how many use it and then invest in a suitable mount etc to go with it. Best regards
Posted by K10D on 10/02/2012 - 01:30
Bird Photographer Question (55-300 & DA550mm)
55-300 is a very good lens and as Mike says the plastic version is identical optically to the metal mount version. I have this lens and use it a lot, BUT NOT for my bird pictures. I have a very old and mint Tamron Adaptamatic 300mm prime which is far better for the bird pics as it is slightly shar...
Posted by davidstorm on 09/02/2012 - 21:59
Bird Photographer Question (55-300 & DA550mm)
DR. O, they are fantastic shots for the 55-300 - I can't squeeze anything like this quality from mine even when monopod mounted. I agree that the AF on this lens is not good for wildlife shots and I find it easier to focus manually with my old Tamron which has a very long focus throw and is buttery...
Posted by davidstorm on 09/02/2012 - 22:05
Bird Photographer Question (55-300 & DA550mm)
I'd sooner use the 150-500 at 300mm than the 55-300mm. I had the 55-300 less than 2 months when I decided I needed something longer, and after buying the 150-500 last Feb, I think the 55-300 was back on the camera about twice until I parted with it a couple of months ago. I now have the 60-250...
Posted by Blythman on 10/02/2012 - 09:31
Manual Extension Tubes - cheap any good?
Sorry - going mad. Are these Pentax K fit? http://www.ffordes.com/product/11111806425381 The back doesn't look like either of my PK fit lenses. They have a small lever sticking up and I can't see that here.
Posted by milamber on 10/02/2012 - 22:36
Manual Extension Tubes - cheap any good?
Thanks - just wondered if these were M42 mount. I don't have any of those lenses to check, but haven't managed to find a K mount image anywhere without the little lever, which these don't have. M42 would be a screw mount iirc, but see what you mean about the little lever. My tubes do have the lever,...
Posted by AndrewH on 10/02/2012 - 23:09
Manual Extension Tubes - cheap any good?
Sorry - going mad. Are these Pentax K fit? http://www.ffordes.com/product/11111806425381 The back doesn't look like either of my PK fit lenses. They have a small lever sticking up and I can't see that here. I'd appreciate it if someone who, unlike me, knows what they are looking for could conf...
Posted by milamber on 11/02/2012 - 08:22
Manual Extension Tubes - cheap any good?
Sorry - going mad. Are these Pentax K fit? http://www.ffordes.com/product/11111806425381 The back doesn't look like either of my PK fit lenses. They have a small lever sticking up and I can't see that here. I'd appreciate it if someone who, unlike me, knows what they are looking for could conf...
Posted by womble on 11/02/2012 - 09:08
Sigma Long Lenses
I have a Tamron 70-200 f2.8 which I've tried with Kenko 1.5x & 2x AF converters and with the Pentax 1.7x. It would not Auto focus with any of them even in good light. I assume it's something in the way the lens is constructed as the same converters work on other lenses with smaller max apertures.
Posted by bforbes on 10/02/2012 - 19:32
Sigma Long Lenses
My 100-300mm used to work perfectly but someone on here had a problem with theirs not making contact properly on the K-5 (was apparently fine on previous bodies). Think he sent it to Sigma and they sorted it. Its still with Sigma with my K5:cry: awaiting a part. When I spoke to sigma they said word...
Posted by carmagw on 10/02/2012 - 21:24
Sigma Long Lenses
Yep, same symptoms. Happened with a K-7 and K20D as well as the K-5. It has been back to Sigma and serviced elsewhere, but the problem usually returns within a few months. PMs welcome if anybody knows a tame Sigma engineer who does a good job for a fair price. I really would like to get it sorted. ...
Posted by simonarron on 10/02/2012 - 21:27
Sigma Long Lenses
Anyway .. back on topic. What about a used 50-500mm (non OS). Should be able to pick one up for a reasonable price now the new OS version is about. I had mine with the K10D and it has since been on the K20D, K-7 and now the K-5. by , on Flickr by , on Flickr by , on Fli...
Posted by Mike-P on 10/02/2012 - 21:37
Sigma Long Lenses
Hi Michael, my 60-250 is rather slow in the autofocus department as is my 50-135. They do however take fantastic pictures, for motorsports it would be a case of pre focusing on a partuicular spot / corner until the car came into shot. Although I have not used them for action shots as I prefer ...
Posted by carmagw on 19/02/2012 - 08:59
Sigma Long Lenses
Hi Michael, my 60-250 is rather slow in the autofocus department as is my 50-135. They do however take fantastic pictures, for motorsports it would be a case of pre focusing on a partuicular spot / corner until the car came into shot. Although I have not used them for action shots as I prefer ...
Posted by Frogfish on 19/02/2012 - 15:01
New 560mm weather sealed?
Pic on the other Pentax forum of the 560mm rear mount. Notice the red ring.
Posted by Mike-P on 11/02/2012 - 18:14
New 560mm weather sealed?
I hope that Falk Lumo doesn't mind me re-posting his thoughts here : Ok, the plot thickens that we are seeing a 4" telescope design here. The length (very long for a tele lens but normal for a scope) being the fifth hint or so. So, I'd like to contribute a bit more insight about what to expect...
Posted by Frogfish on 12/02/2012 - 15:41
Cannot decide between F or A
Hey everyone, I've been looking at the SMC 50mm f1.7 lenses for my K20D but I cannot decide between the F or A one. I have read the reviews on both of them and they both seem to be great especially at their price. But is it better to have the auto-focus on this lens or not? Cheers :).
Posted by NickJS on 11/02/2012 - 19:34
Cannot decide between F or A
I think that if you have an AF body, you might as well get the AF lens. The AF with the 50/1.7 F is much faster than my 28-80 FA zoom and this is really useful in some situations (low light etc.). For a manual focus body, the 'feel' of the manual focus damping improves handling and generally feels b...
Posted by johnha on 17/02/2012 - 02:04
Cannot decide between F or A
I'm with George and Pentaxophile on this. Having recently picked up an 'M' series 50mm 1.7 in as new condition for £22 it's at least as sharp as the FA 50mm 1.7 I had to sell recently to pay the vet's bill (!) Using manual focus and stop down metering is much easier than I would have expected ...
Posted by milamber on 17/02/2012 - 08:41
