Search results for 'back focus' - page 756
Pentax/Sigma 50 f1.4 Comparison
The red square shows the position being focused on and it does flash, but once focused it disappears. The green hexagon and indeed the beep confirmation confirm focus is achieved. If the green hexagon continues flashing, then the systemm has not focused properly.
Posted by johnriley on 05/03/2009 - 13:53
Pentax/Sigma 50 f1.4 Comparison
Reporting back to the forum ... I did some tests last night with my K20D and Pentax-m 50mm f1.7 lens. No problems I'm pleased to say! Stevo/John, I found that the 'in-focus' beep/red-square/green hexagon behaved the same regardless of whether the camera was set to AP-S or AP-C. But it was n...
Posted by salixarbour on 06/03/2009 - 11:41
Pentax/Sigma 50 f1.4 Comparison
Another couple of handy things that might not be immediately obvious: 1. When reviewing images - Use the front dial to switch to previous/next image. Unlike with the 4-way controller, this works even after you have zoomed in, and maintains the zoom. This is extremely useful for comparing focus of...
Posted by iceblinker on 06/03/2009 - 14:00
pentax 18-55mm mark 2 for sale £55 delivered
if interested contact me, only accept paypal, lens has been used once for about ten mins, in new condition comes with box, and a hoya filter attached, box has had bar code removed so i could get cash back from pentax,
Posted by scottthehat on 04/03/2009 - 11:52
Tamron 70-200 2.8 question
I'm planning on purchasing the Tamron 70-200 2.8 and I wonder what TC I can use with this lens on my Pentax K200D? One I have seen on ebay is this one Anyone have experience with this lens and TC? It would be used for aviation photography in replacement of my DA 55-300 I have the tamron 70-...
Posted by loskeran on 04/03/2009 - 16:43
Tamron 70-200 2.8 question
I'm planning on purchasing the Tamron 70-200 2.8 and I wonder what TC I can use with this lens on my Pentax K200D? One I have seen on ebay is this one Anyone have experience with this lens and TC? It would be used for aviation photography in replacement of my DA 55-300 I have the tamron 70-...
Posted by bsierens on 04/03/2009 - 19:24
Tamron 70-200 2.8 question
I have had no problems with missed focusing , the cameras used in the test were Canon and they do have problems with 3rd party manufacturers Sigma included , I was talking to one of the Sigma technicians just 2 days ago and he recons Canons are the worst for focus problems.
Posted by loskeran on 04/03/2009 - 20:08
Tamron 70-200 2.8 question
I understand they cant get there own lenses to focus right never mind a 3rd partys:lol::lol:
Posted by ttk on 04/03/2009 - 20:23
Tamron 70-200 2.8 question
I understand they cant get there own lenses to focus right never mind a 3rd partys:lol::lol: Cough .. Pentax DA* 16-50mm ..cough. I wouldn't say Pentax are perfect either.
Posted by Mike-P on 04/03/2009 - 20:28
Whats this then? A new Vivitar series 1 lens. (85mm f1.4)
I have one of the 70-210mm Series 1’s, it is the f 2.8-4 KA mount,third version by Komine and regarded as the best version.(6 versions in all) Sadly I don’t use it now , just sits in my lens draw. I have the same lens stuck in my draw back in the UK. It has a sticky iris so is pretty useless atm b...
Posted by loskeran on 06/03/2009 - 07:33
Posted by Mike-P on 04/03/2009 - 22:43
Whats this then? A new Vivitar series 1 lens. (85mm f1.4)
I think Bower are just a retail/wholesale setup in New York who do mostly converter lenses, probably all re-badged from Japan. The Bower lens hefty linked to just looks like a re-badge, but the Vivitar has the same lettering as some of the Bower stuff at the bottom of this Vivitar are now owned...
Posted by shim on 05/03/2009 - 09:34
Whats this then? A new Vivitar series 1 lens. (85mm f1.4)
There was some crap put out under the old Series 1 I've got a 28-105mm zoom that's not very good and won't focus beyond about 50ft, paid quite a lot for it new about 1990. shim But then there was also the 70-210mm and the 105mm f2.5 macro which are absolutely superb and still hold their own today...
Posted by Mike-P on 05/03/2009 - 11:16
Whats this then? A new Vivitar series 1 lens. (85mm f1.4)
There was some crap put out under the old Series 1 I've got a 28-105mm zoom that's not very good and won't focus beyond about 50ft, paid quite a lot for it new about 1990. shim I’m pleased to say I have a good Series 1 28-105. From bits I’ve read there were three versions, two with 67mm filter th...
Posted by bforbes on 05/03/2009 - 19:37
Whats this then? A new Vivitar series 1 lens. (85mm f1.4)
The original Vivitar Series 1 lenses were really good and most were something unusual (at least for the time). Then later they started just trying to capitalise on the reputation without actually doing anything clever. Didn't Vivitar as a company go under a while back? perhaps someone has bought ...
Posted by Mongoose on 05/03/2009 - 20:02
Whats this then? A new Vivitar series 1 lens. (85mm f1.4)
I always mistrust ebay listings which get their facts wrong. This lens is NOT fully compatible with automated features on DSLRs, lacking as it does an A setting on its aperture ring. It's stop down metering only. Also, "constant F1.4 aperture" WTF? it's a PRIME, constant over WHAT exactly? ...
Posted by Mongoose on 05/03/2009 - 20:04
Whats this then? A new Vivitar series 1 lens. (85mm f1.4)
There was some crap put out under the old Series 1 I've got a 28-105mm zoom that's not very good and won't focus beyond about 50ft, paid quite a lot for it new about 1990. shim I’m pleased to say I have a good Series 1 28-105. From bits I’ve read there were three versions, two with 67mm filter th...
Posted by shim on 05/03/2009 - 21:05
Whats this then? A new Vivitar series 1 lens. (85mm f1.4)
There was some crap put out under the old Series 1 I've got a 28-105mm zoom that's not very good and won't focus beyond about 50ft, paid quite a lot for it new about 1990. shim But then there was also the 70-210mm and the 105mm f2.5 macro which are absolutely superb and still hold their own today...
Posted by loskeran on 05/03/2009 - 21:18
Whats this then? A new Vivitar series 1 lens. (85mm f1.4)
I have one of the 70-210mm Series 1’s, it is the f 2.8-4 KA mount,third version by Komine and regarded as the best version.(6 versions in all) Sadly I don’t use it now , just sits in my lens draw. I have the same lens stuck in my draw back in the UK. It has a sticky iris so is pretty useless atm b...
Posted by Mike-P on 05/03/2009 - 21:41
Help with AF with Pentax 55-300 mm
Hi everyone I came across this problem just by chance while trying to focus on the edge of a tree trunk. What I suddenly realised was that it wasn't locking on unless I aimed slightly lower to the edge with the red focusing dot on my viewfinder, then it would lock and snap. And suddenly I foun...
Posted by aminstar on 05/03/2009 - 12:40
