I'm a newbie in DSLR, so I would like to ask what is the total length if my camera is a 1.6x crop-factor & I'm using a 300mm lens. So how do u calculate???

Thanks for all replies.

2. Simple. Your len is a 300mm focal length. So of course it's a 300mm focal length.

3. 300 x 1.6
so it is 480mm

4. Originally Posted by latmo
300 x 1.6
so it is 480mm
Nope, it is not. A 300mm len is 300mm, how can it be 480mm? Unless you're using a teleconverter, else the distance remains the same.

5. Originally Posted by latmo
300 x 1.6
so it is 480mm
Nope, its like espn says, a 300mm lens, is a 300mm lens. You don't magically get a longer focal range just because you're using a DSLR. What you do get is the field of view equivalent to a 480mm lens.

6. Yes, Gymrat76 is right. See this for a very good explanation:
http://luminous-landscape.com/tutori...dslr-mag.shtml

7. oh i see
i always thought that DSLR got a free 1.6X zoom lol

8. Originally Posted by Gymrat76
Nope, its like espn says, a 300mm lens, is a 300mm lens. You don't magically get a longer focal range just because you're using a DSLR. What you do get is the field of view equivalent to a 480mm lens.
So does that mean tat u will get 480mm when on LCD display or printing out........???

9. i suppose u get an image of 480mm equalvient. only FOV changed, focal length changed.

i suppose u get an image of 480mm equalvient. only FOV changed, focal length changed.
Nope, focal length didn't change, your focal view angle changed.

11. Originally Posted by polo_pro10
So does that mean tat u will get 480mm when on LCD display or printing out........???

12. Nope, it'll still show 300mm.

13. The size of the image will be the same as a 480mm lens mounted on a full frame body but the EXIF info of the image will still show as 300mm as it is cropped.

14. Yup although technically you are not getting a 480mm image, you get what appears to be a 480 mm image. Its similar to the crop tool in photoshop if you could look at it that way...

15. Originally Posted by espn
Nope, focal length didn't change, your focal view angle changed.
oops. typed wrongly. hehe. yea. focal length unchanged. silly me.

16. Originally Posted by espn
Nope, focal length didn't change, your focal view angle changed.
focal view angle?

wow, new terminology...

17. Originally Posted by majere2sg
The size of the image will be the same as a 480mm lens mounted on a full frame body but the EXIF info of the image will still show as 300mm as it is cropped.
What does EXIF info mean???

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