Picture of the Day

[Bootup05]

well all zoom is, is the ratio of the largest focal length/smallest focal length.

If you want ability to see further than you want Larger Focal length. And technically larger focal length ratio lens' tend to have worse IQ.

ex: the Canon 1200mm F4 L is technically a 0x Zoom

but I doubt it's picture looks anything like your 0x Zoom lol

When canon talk about a 1200mm focal length, what do they compare it to? Because there's no smaller focal length, do they just say something like our 1200mm lense will take pictures comparible to a standard 35mm in 35X Optical Zoom?

Or do people not need to know, is there some way of working out what the 1200mm equals out into the real world? Because me as a noob has no idea how far in distance that lense can focus, and also, what's that lense actually used for? Taking shots of what? Planes the Moon etc?

Shed some light

*imagines*

It would be extremely slow, have an insane (not the good kind) variable aperture, have horrible image quality and be very bulky.

Do companies even make lenses that with ranges like that?

I don't have a DSLR, (Couldn't afford one, I have a Superzoom instead, was the best I could afford thats the lense it's been designed for and works ok (yeah its quite slow at extreme focal lengths )

Would it not be inefficient for somebody to bring out such a lense, seing as its basically what a cheaper camera is based around

I thought that was the whole reason photographers carried around many different lenses for different scenes, so that the lense that they use would be designed and work much better in a certain situation and therefore produce a better image instead of using a lense that is probably not as good all over the field?

Sorry for the big post, just trying to learn something