Go Back   Steve's Digicams Forums > Digital SLR and Interchangeable Lens Cameras > Canon Lenses

Reply
 
Thread Tools Search this Thread
Old Aug 1, 2005, 11:18 PM   #1
Senior Member
 
Join Date: Jun 2005
Posts: 213
Default

ok, i am used to my 12x optical zoom on my FZ10, which i just sold. i realize that 12x is a marketing ploy to make the point and shoot camerasmore sought after, but how does this really compare with slr lenses?

i know that in a non-prime lens, say in a 70-200mm lens, you take the second number and divide it into the first, so 200/70, and this is the optical zoom. but, when this is compared to what's considered a huge zoom lens, this is what throws me off, for it does not even close to a 12x "optical".

as you can see i'm confused, so if anyone can clear this up for me, it will be greatly appreciated.

-jon rowe
jedmag is offline   Reply With Quote
Sponsored Links
Old Aug 1, 2005, 11:24 PM   #2
NHL
Senior Member
 
NHL's Avatar
 
Join Date: Jun 2002
Location: 39.18776, -77.311353333333
Posts: 11,547
Default

The FZ10 has an equivalent of 35-420mm lens (420/35 = 12)
A Sigma 50-500mm zoom has slighly more range from what you get on the FZ10, but its zoom ratio is only 10... :idea:

A 70-200 will be much shorter from what you use to...
NHL is offline   Reply With Quote
Old Aug 2, 2005, 12:44 AM   #3
Super Moderator
 
Hards80's Avatar
 
Join Date: Nov 2004
Location: Cleveland, OH
Posts: 9,046
Default

i have the 80-400 OS from sigma.. this will give you optical stabilization and a maximum range longer than your fz-10 (400 x 1.6 = 640).. i couldnt be happier w/ this lens as it is sharp and produces excellent colors..


Hards80 is offline   Reply With Quote
Old Aug 3, 2005, 10:39 PM   #4
Senior Member
 
Join Date: Feb 2005
Posts: 175
Default

A direct correlation doesn't really apply. Since getting into slr's and away from point and shoot cameras, I no longer think about the "x factor" that p&s cameras are sold by. Rather, what matters now is what focal lengths my lens selection covers. I have a few lenses that, together, cover from 28mm to 450mm, and I now must select the right lens(es) for each type of shooting situation.
ChrisDM is offline   Reply With Quote
Old Aug 3, 2005, 11:48 PM   #5
Senior Member
 
Join Date: Jul 2003
Posts: 3,396
Default

Right,
You are more interested in the lenses Field Of View.

There used to be a great chart showing the different focal lengths and their FOV, but I can't for the life of me find the link to it.

Peter.
PeterP is offline   Reply With Quote
Old Aug 4, 2005, 7:32 AM   #6
NHL
Senior Member
 
NHL's Avatar
 
Join Date: Jun 2002
Location: 39.18776, -77.311353333333
Posts: 11,547
Default

PeterP wrote:
Quote:
There used to be a great chart showing the different focal lengths and their FOV, but I can't for the life of me find the link to it.
There's a formula here: "Angle of View" vs "Focal Length"

... and in pictorial form
NHL is offline   Reply With Quote
Old Aug 4, 2005, 8:19 AM   #7
Senior Member
 
polarwasp's Avatar
 
Join Date: Jun 2005
Posts: 167
Default

Here is the plot composed from both your links NHL. Never realised 36/24 was so close to 1.6!!
Attached Images
 
polarwasp is offline   Reply With Quote
 
Reply


Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off



All times are GMT -5. The time now is 10:42 PM.