0.45x wide angle convertor

lypklypk · 20th April 2007

I've not used such a convertor before, but I'm interested. If I mount this onto a 18-55 kit lens, does it effectively turn the 18mm into a 11.7mm wide (Before the crop factor) with the perspective similar to that of the Sigma 12-24mm on the wide end (mounted on a full-frame/film cam)?

Cause if this can be done, then it's a really cheap way of getting the ultra-wide angle with the exaggerated perspective to boot.

Anyone with sample photos to show of this combination?

tribal.snake · 20th April 2007

is a cheap way. but u are losing image quality and control.

lypklypk · 20th April 2007

Originally Posted by tribal.snake

is a cheap way. but u are losing image quality and control.

Yup. The quality will definitely suffer, but control?

Minus70 · 20th April 2007

Where do you find such device?

tribal.snake · 20th April 2007

is just an adapter, not much u can do with the dof or manual focusing etc.

can probably get it at CP.

calebk · 20th April 2007

Originally Posted by tribal.snake

is just an adapter, not much u can do with the dof or manual focusing etc.

can probably get it at CP.

Does this affect AF or AF accuracy? It's in the form of a filter, am I right?

holidaydom · 20th April 2007

I've considered converters for quite a while too.

Generally, I feel that wide angle converters tend to have too much distorsion for my liking (unless of course you go for the high quality/price models), Telephoto converters are more acceptable.

But the key point that's stopping me from slapping one on is the weight.

High quality converters tend to be heavy cos of all the glass that's in there and they'll put a lot of stress on the focusing mechanism of the lens (unless your lens has an internal focusing mechanism)

Something to think about, other than the image quality

tribal.snake · 20th April 2007

depends on the make, have seen some screwed on and some are slot over ("tight fit")

20th April 2007	#1
lypklypk Member Join Date: Oct 2006 Posts: 863	0.45x wide angle convertor I've not used such a convertor before, but I'm interested. If I mount this onto a 18-55 kit lens, does it effectively turn the 18mm into a 11.7mm wide (Before the crop factor) with the perspective similar to that of the Sigma 12-24mm on the wide end (mounted on a full-frame/film cam)? Cause if this can be done, then it's a really cheap way of getting the ultra-wide angle with the exaggerated perspective to boot. Anyone with sample photos to show of this combination? Last edited by lypklypk; 20th April 2007 at 08:34 AM.

20th April 2007	#2
tribal.snake Member Join Date: Dec 2006 Location: west side! Posts: 685	Re: 0.45x wide angle convertor is a cheap way. but u are losing image quality and control.

20th April 2007	#4
Minus70 Member Join Date: Jan 2007 Location: Infront of Computer Posts: 137	Re: 0.45x wide angle convertor Where do you find such device?

20th April 2007	#5
tribal.snake Member Join Date: Dec 2006 Location: west side! Posts: 685	Re: 0.45x wide angle convertor is just an adapter, not much u can do with the dof or manual focusing etc. can probably get it at CP.

20th April 2007	#7
holidaydom Member Join Date: Aug 2006 Posts: 885	Re: 0.45x wide angle convertor I've considered converters for quite a while too. Generally, I feel that wide angle converters tend to have too much distorsion for my liking (unless of course you go for the high quality/price models), Telephoto converters are more acceptable. But the key point that's stopping me from slapping one on is the weight. High quality converters tend to be heavy cos of all the glass that's in there and they'll put a lot of stress on the focusing mechanism of the lens (unless your lens has an internal focusing mechanism) Something to think about, other than the image quality

20th April 2007	#8
tribal.snake Member Join Date: Dec 2006 Location: west side! Posts: 685	Re: 0.45x wide angle convertor depends on the make, have seen some screwed on and some are slot over ("tight fit")