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-   Canon XF Series 4K and HD Camcorders (https://www.dvinfo.net/forum/canon-xf-series-4k-hd-camcorders/)
-   -   XF100 First impressions (https://www.dvinfo.net/forum/canon-xf-series-4k-hd-camcorders/492237-xf100-first-impressions.html)

Anthony Mozora March 31st, 2011 09:36 AM
Re: XF100 First impressions
 
thank u for ur reply Pat and the link, yes the canon xha1 seems to be a bit better in low light .but generally a much better camera and will be a good Investment for me..I am planing to use it as a second camera to my Sony nx5

Martin Evans February 17th, 2015 12:53 PM
XF100 Focal Length Guide
 
Hello, I'm new to this forum and had my XF100 for only couple of months. I'm trying to estimate focal length from the on camera guide so I can find DOF using say simple DOF. The camera gives me a number from 0-100 and I found this old thread below but Charles says he gets 0-153 which confuses me. Have Canon changed the focal length guide numbering. Anyone else have a tabulation of the focal length guide to actual lens focal length or a 35mm equiv.

Thanks in advance.


Quote:
Originally Posted by Charles W. Hull (Post 1622737)
I checked to see if the Focal Length Guide number is linear. The guide has 154 values (0 to 153); I set it to 0 with the focal length at 30.4mm; it then reads 153 at 304mm.

I compared the field of view to several lenses on a Canon 5DMkII, with the XF100 and the 5DMkII approximately the same diatance from a target (a bookshelf). As the target was fairly close the accuracy of this method for focal length is not good for the longer focal lengths, but I was only looking for the comparitive field of view. Also 35mm lens focal length numbers are not gospel, so the comparisons should be taken as approximate.

The Guide number is NOT linear. Here are the comparative numbers:

30.4mm FL# 0
40mm FL# 21 (Canon 17-40mm set to 40mm)
50mm FL# 31 (Sigma 50mm)
50mm FL# 35 (Canon 24-105mm set to 50mm mark)
70mm FL# 61 (Canon 70-200mm set to 70mm)
105mm FL# 83 (Canon 24-105mm set to 105mm)
200mm FL# 143 (Canon 70-200mm set to 200mm)
304mm FL# 153

As an example, if the FL# was linear, 40mm would be FL# 5 and 50mm would be FL# 11.

I do quite a bit of video around 50mm, so the FL# for 50mm is in the range of 31-35.


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