If this is your first visit, be sure to check out the FAQ by clicking the link above. You may have to register before you can post: click the register link above to proceed. To start viewing messages, select the forum that you want to visit from the selection below. |
|
|
Thread Tools | Display Modes |
#1
|
|||
|
|||
auto focus in digital cameras any different that auto focus in film cameras?
Is there any basic difference in the autofocussing technology in
digital cameras vs film cameras? I have an Olympus 750 and it seems like it takes longer to achieve autofocus than its cheaper brother a stylus point and zoom shoot film camera.. Is the digital camera just trying to do a better job, does the autofocus have to work harder in a digital camera or is the difference that I perceive not really there? Especially in low light this problem is aggravating and its not helped by the fact that the manual focus mode is not very easy to use. Boy I'd love to be able to grab a ring and turn it to get focus. As it is its a lot of button and menu button selection. I guess that's the price you pay for a low end digital camera. tks Don |
#3
|
|||
|
|||
auto focus in digital cameras any different that auto focus in film cameras?
wrote in message oups.com... Is there any basic difference in the autofocussing technology in digital cameras vs film cameras? Digital SLRs use the same autofocus as their film counterparts. Digital P&S cameras use an abomination known as Contrast Detect. It is universally known for being crappy and slow, especially in low light. I can't speak for your particular camera, but there are some tricks that will sometimes help Contrast Detect cameras find focus. Most importantly, attempt to focus on something that has high contrast. Human faces have low contrast, and that is what we largely focus on. Try clothing instead, although make sure you find something the same distance away. Also, some cameras use an algorithm that is tied to contrast in a verticle direction. For some circumstances, rotating the camera 90 degrees will allow it to work. Cheers! Andrew |
#4
|
|||
|
|||
auto focus in digital cameras any different that auto focus in film cameras?
Especially in low light this problem is aggravating and its not helped
by the fact that the manual focus mode is not very easy to use. Boy I'd love to be able to grab a ring and turn it to get focus. As it is its a lot of button and menu button selection. I guess that's the price you pay for a low end digital camera. I too have a C750. In low light, I switch to manual focus, estimate the distance and set to that distance. Because of the great depth of field of these cameras this method works very well. I don't try and focus by looking at the screen. The resolution is just too low. Malcolm |
#5
|
|||
|
|||
auto focus in digital cameras any different that auto focus in film cameras?
tks everyone.
I'll just have to set a "program" in for manual focus and use that and I agree Malcolm looking at the viewfinder/screen does not help. I wonder if the film Olympus PS Stylus uses something different. It doesn't seem as susceptible to the problem. Maybe it doesnt' try/work as hard. Don |
#6
|
|||
|
|||
auto focus in digital cameras any different that auto focus in film cameras?
|
Thread Tools | |
Display Modes | |
|
|
Similar Threads | ||||
Thread | Thread Starter | Forum | Replies | Last Post |
is it a forgone conclusion... | Robert S. Dean | In The Darkroom | 123 | March 18th 05 05:15 AM |
Focal plane vs. leaf shutters in MF SLRs | KM | Medium Format Photography Equipment | 724 | December 7th 04 10:58 AM |
What will happen to classic film cameras? | Mike Henley | 35mm Photo Equipment | 15 | July 6th 04 06:24 PM |
Digital Imaging vs. (Digital and Film) Photography | Bob Monaghan | Medium Format Photography Equipment | 9 | June 19th 04 05:48 PM |
Which is better? digital cameras or older crappy cameras thatuse film? | Michael Weinstein, M.D. | In The Darkroom | 13 | January 24th 04 10:51 PM |