05-17-2011, 04:55 PM
(This post was last modified: 05-17-2011, 04:59 PM by Brightcolours.)
[quote name='olegk' timestamp='1305650577' post='8422']
(I know the community here tends to dislike my pictures, but this time I need some to demonstrate the case.)
I claim that in many practical cases high continuous-shooting frame rate of the Sony A55 can compensate for the presumed AF-speed deficiency.
I don't really care whether the camera fitted with 50mm f/1.4 in someone's hands can track an approaching train.
What I already know, is that in my hands, when fitted with either 16-80 f/3.5-4.5 or 70-210 f/4, it's unable to track my dog running towards me.
So, my solution is to preset the focus for the desired subject size, set the 6 fps or 10 fps mode, and keep the shutter pressed for approximately a second at the right moment.
After several rounds I'm rewarded with 1-2 usable pictures.
By the way, the dog's picture here is taken with an MF lens - Jupiter 37 - 135mm f/3.5 - made in USSR in early 80s. It has enormous number of aperture blades, and thus greatly outperforms the 70-210 set at 135mm in defocusing the background trees.
The flower-and-bug picture was taken with the 16-80 and 10 fps. The swinging of my head with the attached camera did the focus-guess job.
[/quote]
I would not mind what some say about your pictures, Oleg. there are some that at times make the most ignorant comments to my images too, and such comments have no value.
What a funny cute dog you have! Seems very playful, huh?
I do not think that your solution, to counter the not so good AF tracking speed, is to just fire away machine gun style.... Not only does it give you vast amounts of unnecessary data, but it also wears your shutter life time down drastically.... If AF tracking speed is what you desire, maybe a different brand body with fast AF-ing lens might be a nice addition.
I myself have not yet had the need for fast AF tracking, but some tests I ran to illustrate the silliness of some claims regarding the A55v did show that even my 450D can do an adequate job in certain circumstances, tracking "fast" moving subject, with my 70-200mm f4 L USM.
Your 70-210 is the well-liked Minolta f4 "beer can", am I right?
The bumble bee is quite nice too.
I don't think the number of aperture blades will defocus more, but it might make "highlights" more smooth. How many aperture blades does it have?
The lens with the highest number of aperture blades that i have is the Nikkor-Micro_Ultra 55mm f2, it has 12 aperture blades!
(I know the community here tends to dislike my pictures, but this time I need some to demonstrate the case.)
I claim that in many practical cases high continuous-shooting frame rate of the Sony A55 can compensate for the presumed AF-speed deficiency.
I don't really care whether the camera fitted with 50mm f/1.4 in someone's hands can track an approaching train.
What I already know, is that in my hands, when fitted with either 16-80 f/3.5-4.5 or 70-210 f/4, it's unable to track my dog running towards me.
So, my solution is to preset the focus for the desired subject size, set the 6 fps or 10 fps mode, and keep the shutter pressed for approximately a second at the right moment.
After several rounds I'm rewarded with 1-2 usable pictures.
By the way, the dog's picture here is taken with an MF lens - Jupiter 37 - 135mm f/3.5 - made in USSR in early 80s. It has enormous number of aperture blades, and thus greatly outperforms the 70-210 set at 135mm in defocusing the background trees.
The flower-and-bug picture was taken with the 16-80 and 10 fps. The swinging of my head with the attached camera did the focus-guess job.
[/quote]
I would not mind what some say about your pictures, Oleg. there are some that at times make the most ignorant comments to my images too, and such comments have no value.
What a funny cute dog you have! Seems very playful, huh?
I do not think that your solution, to counter the not so good AF tracking speed, is to just fire away machine gun style.... Not only does it give you vast amounts of unnecessary data, but it also wears your shutter life time down drastically.... If AF tracking speed is what you desire, maybe a different brand body with fast AF-ing lens might be a nice addition.
I myself have not yet had the need for fast AF tracking, but some tests I ran to illustrate the silliness of some claims regarding the A55v did show that even my 450D can do an adequate job in certain circumstances, tracking "fast" moving subject, with my 70-200mm f4 L USM.
Your 70-210 is the well-liked Minolta f4 "beer can", am I right?
The bumble bee is quite nice too.
I don't think the number of aperture blades will defocus more, but it might make "highlights" more smooth. How many aperture blades does it have?
The lens with the highest number of aperture blades that i have is the Nikkor-Micro_Ultra 55mm f2, it has 12 aperture blades!