Search results for 'back focus' - page 979
Pentax FA 100mm Macro Lens
At macro scale (1:1) DOF is razor-thin, essentially zero. Plug numbers into an online DOF calculator; read-em and weep. (200mm lens; f/32; subject 100mm away; DOF is 0.1mm on either size of the focus point. Ouch.) Focusing rails can be used, and focus-stacking software, to make the non-flat viewable...
Posted by RioRico on 27/06/2011 - 21:26
Pentax FA 100mm Macro Lens
Focus stacking is an excellent way of achieving excellent results, the shot below is only me second or third attempt at it.
Posted by snappychappy on 27/06/2011 - 22:45
Pentax FA 100mm Macro Lens
For critical work close up, where there is very little DOF at best, focus very carefully on the . Beware the circles of confusion, eh John. First time I've thought of that term in a while.
Posted by lemmy on 27/06/2011 - 22:55
Telephoto Poll
Since you stated mainly wildlife then I'd agree with John and go the the DA*300 + TCs if necessary. For field sports a 70-200/2.8 is going to be much better, in fact for the X games I used a 50-150 and it was the perfect lense for the job (I had the *300 with me but it was just too long). If you...
Posted by Frogfish on 28/06/2011 - 09:38
Telephoto Poll
Since you stated mainly wildlife then I'd agree with John and go the the DA*300 + TCs if necessary. For field sports a 70-200/2.8 is going to be much better, in fact for the X games I used a 50-150 and it was the perfect lense for the job (I had the *300 with me but it was just too long). If you...
Posted by karthikv82 on 28/06/2011 - 10:24
Telephoto Poll
Will write to Sigma Corp Japan today and see if they have stock of 100-300 F4 I wrote to them in the early '90s regarding the 300/4 APO Tele Macro and 70-210/2.8 APO, I got a reply back stating that if Pentax increased it's market share they would consider making these lenses in Pentax fit. Shortly ...
Posted by johnwhit on 29/06/2011 - 12:39
Picture Taking and Security - The use of Limited Lenses
I travel a lot for my job and do get to some interesting places that demand to be photographed. But sometimes due to personal security or cultural issues the use of an expensive-looking camera or a long telephoto lens is not appropriate. My boss let me know a while back that he needed to visit India...
Posted by pudser on 28/06/2011 - 03:59
Picture Taking and Security - The use of Limited Lenses
I hear ya, I must admit I felt far safer wandering round Muscat taking pictures than I do going about my birthplace of Aberdeen in Scotland. I must admit I had loads of screwy misconeptions about the Middle East prior to staying in Oman.........what a beautiful place with such friendly people Oman i...
Posted by Sandehalynch on 28/06/2011 - 16:01
Picture Taking and Security - The use of Limited Lenses
That's terrible Joe. :( I hope you were left with your sd cards, or had been able to back your shots up somehow.
Posted by Pentaxophile on 28/06/2011 - 19:30
Picture Taking and Security - The use of Limited Lenses
Old joke from the USA SouthWest: A big-city Easterner (from New York or Philadelphia or someplace like that) is vacationing Out West. He drives to a remote village and hires a Navaho Indian guide to take him on a horseback-camping tour of the Wild West back country. But he worries aloud about the sa...
Posted by RioRico on 28/06/2011 - 23:41
Picture Taking and Security - The use of Limited Lenses
Great Pictures, man. I hope someday to go back to Oman on vacation I hear ya, I must admit I felt far safer wandering round Muscat taking pictures than I do going about my birthplace of Aberdeen in Scotland. I must admit I had loads of screwy misconeptions about the Middle East prior to staying ...
Posted by pudser on 30/06/2011 - 00:32
Picture Taking and Security - The use of Limited Lenses
I've lived in Oman for (18) years and have currently settled in Bangalore, India. I have traveled all over the world and find India very safe. In fact I had my backpack stolen in Rome with my passport and K20D. Revenue from sales of DSLRs in India = sales from all P&S cameras put together. Just wa...
Posted by pudser on 01/07/2011 - 19:48
My New Baby
The picture from the A* is actually 11% bigger then the DA* Use a small extension tube to get closer than 4M A couple of good tips there Algi, I did try pointing at the bird feeders in the garden and it did seem to have a bit more reach than I expected, the extension tubes could be a good idea too, ...
Posted by fatspider on 29/06/2011 - 17:31
My New Baby
Congratulations Alan and have fun. I have a 25mm auto extension tube.:!::D I just use a 6mm Ricoh manual tube (Rare). It allows focus from 3M to about 8M. A 12mm should be OK. It's rare to be closer than 4M with birds so the lens on it's own is OK.
Posted by Algernon on 29/06/2011 - 20:44
My New Baby
First results lead me to think I will be quite pleased with this lens; Full frame, no PP other than resize & compress. Two more crops at 100%, again no PP other than compress file size; 1/500th f10 using catch in focus. There is some fringing which I suppose can be expected ...
Posted by fatspider on 29/06/2011 - 22:15
Any ideas what this lens is?
Agreed. Curious description from what appears to be a genuine seller. He even offered a money back guarantee. Davex.
Posted by davex on 30/06/2011 - 09:23
Limiteds - DA 70mm or FA 77mm
http://pentaxlife.com/da-limited-on-film I think some of the DA ltds can be used, but are not optimised for film with the quality dropping off towards the edge of the frame. Although the 70mm doesn't look too bad, and you'd be OK with the subject roughly central, and the background deliberately t...
Posted by Pentaxophile on 30/06/2011 - 13:34
Limiteds - DA 70mm or FA 77mm
http://pentaxlife.com/da-limited-on-film I think some of the DA ltds can be used, but are not optimised for film with the quality dropping off towards the edge of the frame. Although the 70mm doesn't look too bad, and you'd be OK with the subject roughly central, and the background deliberately t...
Posted by johnwhit on 30/06/2011 - 14:03
Limiteds - DA 70mm or FA 77mm
It works very well since you can still use A mode and control aperture with the ring. Exposure is then significantly more accurate than on a Pentax body itself. Focus is set using focus ring as usual and it's quite easy to see the "snap" on the LCD. There is also a magnification system to assist in ...
Posted by rparmar on 02/07/2011 - 13:27
Limiteds - DA 70mm or FA 77mm
Hundreds of threads on dozens of forums have asked the same question. It always comes down to the same thing. The DA70 is a very good lens. Those who have it are happy with it. A small minority prefer it to the FA77. Everyone else, whether they can afford it or not, consider the FA77 to be t...
Posted by rparmar on 05/07/2011 - 14:16
