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
|
|||
|
|||
Problems with Canon EF 50mm f/1.8 Lens
In message bApIc.75875$WB5.68310@pd7tw2no, Dave
writes The bizarre, off topic and biased comments notwithstanding, DOF is related to focal length, film/digital format, subject distance, and apeture. It is largely unrelated to manufacturer. You could do a google search for online free calculators that will give you DOF after you put in the details of your lens. For example, For 35mm, the circle of confusion is 0.025mm. Multiply the F number used by the circle of confusion. Multiply this by the (magnification+1) and then divide the answer by the magnification squared. The total depth of field is twice this number (in units of mm). Or the practical way. Looking at the DoF scale on my 50mm f1.7 lens, it doesn't even have markings below f4. Focused at 1.5m, the next distance marking on the lens is 1.75m. This is way off the end of the DoF scale. So yes, you will have a shallow DoF when close-up with a fast lens wide open. -- ---------------------------- Paul Friday |
Thread Tools | |
Display Modes | |
|
|
Similar Threads | ||||
Thread | Thread Starter | Forum | Replies | Last Post |
Problems with Canon EF 50mm f/1.8 Lens | Dave | Digital Photography | 10 | July 13th 04 01:04 PM |
Recommendation for a Canon lens | [email protected] | Photographing Nature | 13 | July 8th 04 02:10 AM |
Which lens for wedding (Canon 300d) | Joseph Meehan | Digital Photography | 11 | July 8th 04 01:40 AM |
swing lens cameras and focussing distance | RolandRB | Medium Format Photography Equipment | 30 | June 21st 04 05:12 AM |
200 mm IS: a hole in Canon lens line? | Roger N. Clark (change username to rnclark) | Photographing Nature | 4 | March 13th 04 07:18 PM |