Search results for 'back focus' - page 1026
Pentax announce 5 new lenses + k adaptor for Q
Re: new K-01 lens Yikes! Looks like that bulge on the back will make havoc for the mirror if you accidentally put it on a dSLR! But it seems sensible to make optical use of that extra space between the sensor and mounting flange :) Matt
Posted by MattMatic on 08/02/2012 - 11:55
Pentax announce 5 new lenses + k adaptor for Q
Pentax already had a lens in this focal range... a telescope they start with that, add some parts to the rear for focus and k-mount... and boom tele is done... little r&d, existing parts bin special.... and that means...... $2,350.00 MRSP and a $1999.00 retail price.... possibly....:?
Posted by Don on 08/02/2012 - 16:21
Pentax announce 5 new lenses + k adaptor for Q
Pentax already had a lens in this focal range... a telescope they start with that, add some parts to the rear for focus and k-mount... and boom tele is done... little r&d, existing parts bin special.... and that means...... $2,350.00 MRSP and a $1999.00 retail price.... possibly....:? Well if it...
Posted by MarkD on 08/02/2012 - 21:06
New 560mm minimum focus distance
Does anyone know what the minimum focus distance of the new 560mm will be? This could the the deal breaker for me I've had a look and the minimum focus for the Nikon 500mm F4 is 4 metres, I'm guessing the 560mm will need to focus at about 6m to make it a viable birding lens.
Posted by mille19 on 09/02/2012 - 12:13
New 560mm minimum focus distance
Sigma 500mm f/4.5 is also 4 metres. Best regards
Posted by K10D on 09/02/2012 - 12:18
New 560mm minimum focus distance
it's based on a telescope... I'm thinking 4 meters min... under six for sure. to be fair a short extension tube is what many pro use with tele's to get in closer... If I was up close birding, I'd want the 200mm with af 1.7 and a short extension tube combined... I've tried this with the 100 macro ...
Posted by Don on 09/02/2012 - 12:55
New 560mm minimum focus distance
If it's based on a telescope....... it should focus on the moon without any problems :mrgreen:
Posted by Algernon on 09/02/2012 - 13:00
New 560mm minimum focus distance
Well the games afoot. Sony have announced a dust and moisture resistant 500mm f/4 along with a new FF DSLR. Also 4 metre min focus. So there will be plenty of competition for peoples long lens money. Best regards
Posted by K10D on 09/02/2012 - 13:02
New 560mm minimum focus distance
Well the games afoot. Sony have announced a dust and moisture resistant 500mm f/4 along with a new FF DSLR. Also 4 metre min focus. So there will be plenty of competition for peoples long lens money. Best regards gotta remember the 500 on a ff is like 500 fov.. 550 on a 1.5 crop aps-c sensor......
Posted by Don on 09/02/2012 - 13:08
New 560mm minimum focus distance
Well the games afoot. Sony have announced a dust and moisture resistant 500mm f/4 along with a new FF DSLR. Also 4 metre min focus. So there will be plenty of competition for peoples long lens money. Best regards gotta remember the 500 on a ff is like 500 fov.. 550 on a 1.5 crop aps-c sensor......
Posted by Algernon on 09/02/2012 - 13:29
New 560mm minimum focus distance
If it's based on a telescope....... it should focus on the moon without any problems :mrgreen: My Tasco scope needs extreme care to focus on the moon through the K100d, (not yet tried it with the K7's brighter viewfinder/liveview). So it's not a foregone conclusion. Zoomed out to 1000mm (f16) it...
Posted by petrochemist on 09/02/2012 - 13:33
New 560mm minimum focus distance
I cant see what the problem is with the minimum focus distance, 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, the only thing it will stop you doing is filling the frame with anything smaller such...
Posted by fatspider on 09/02/2012 - 13:34
New 560mm minimum focus distance
I cant see what the problem is with the minimum focus distance, 560mm will give you a decent sized shot of a Sparrow or similar at about 5 metres I agree, but I've read that "The lens is optimized for rendering distant subjects" and "The DA 560mm is based on optics used in astronomical telescopes" s...
Posted by mille19 on 09/02/2012 - 13:43
New 560mm minimum focus distance
I would imagine astronomical telescopes need to be particularly rigorous in removing chromatic aberration, so that sounds promising. It does just say "based on" though, so we'll need to see what we get when there's more detail about. Like all lenses, the 560mm will be aimed at a particular purpos...
Posted by johnriley on 09/02/2012 - 13:47
New 560mm minimum focus distance
[quote:3496ace15f="K10D"]Well the games afoot. Sony have announced a dust and moisture resistant 500mm f/4 along with a new FF DSLR. Also 4 metre min focus. So there will be plenty of competition for peoples long lens money. Best regards gotta remember the 500 on a ff is like 500 fov.. 550 on a...
Posted by Don on 09/02/2012 - 13:54
New 560mm minimum focus distance
You could always crop the Sony images to get the same.... :wink: (Or use an APSC Sony of course!)
Posted by Pentaxophile on 09/02/2012 - 13:58
New 560mm minimum focus distance
so what if the minimum focus distance is 10 metres? Then the lens will lose half of its prospective market starting with me!
Posted by fatspider on 09/02/2012 - 17:59
New 560mm minimum focus distance
Well the games afoot. Sony have announced a dust and moisture resistant 500mm f/4 along with a new FF DSLR. Also 4 metre min focus. So there will be plenty of competition for peoples long lens money. Best regards I don't think there wil be a long queue .. the Sony is variously being quoted as US...
Posted by Frogfish on 09/02/2012 - 18:03
New 560mm minimum focus distance
I think Sony face a bit of a dilemna with the new FF camera. If they keep the translucent lens tech they basically have a cmaera that RESTRICTS the amount of light to the sensor (photography is all about light no?). if they go back to a Pentaprism they are saying the SLT isnt good enough for a pr...
Posted by japers45 on 09/02/2012 - 18:23
New 560mm minimum focus distance
[quote:3496ace15f="K10D"]Well the games afoot. Sony have announced a dust and moisture resistant 500mm f/4 along with a new FF DSLR. Also 4 metre min focus. So there will be plenty of competition for peoples long lens money. Best regards gotta remember the 500 on a ff is like 500 fov.. 550 on a...
Posted by K10D on 09/02/2012 - 23:47
