|
Title: New lens for my 20D Post by: 2_Rastas on September 25, 2008, 01:52:00 PM Hey folks, I have a 20D so that means that any lens I buy from Canon I will have to multiply the size by 1.6 right?
I have the Canon 85mm prime lens but that works out to 136mm. I would like something closer to 35mm. The closest I have found is the Canon 50mm but that would be more like 85mm on my camera. Any suggestions? Title: Re: New lens for my 20D Post by: Bob Atkins on September 25, 2008, 03:47:36 PM I'd look at the Canon EF 24/2.8 (http://www.amazon.com/exec/obidos/ASIN/B00006I53R/bobatkinsphotogr) if you want a prime. It's the equivalent of a 38mm lens on a full frame camera. It's the lens I use myself on a 40D when I want a "wide-normal" lens.
Obviously you can use a setting around 22mm on any zoom that covers that range such as the EF-S 18-55 (http://www.amazon.com/exec/obidos/ASIN/B000V5K3FG/bobatkinsphotogr) the EF-S 17-85 IS (http://www.amazon.com/exec/obidos/ASIN/B0002Y5WXO/bobatkinsphotogr), the EF 17-40/4L (http://www.amazon.com/exec/obidos/ASIN/B00009R6WO/bobatkinsphotogr) or (the best of all) the EF-S 17-55/2.8L (http://www.amazon.com/exec/obidos/ASIN/B000EW8074/bobatkinsphotogr) This article explains the whole "crop sensor/lens multiplier" issue - http://www.bobatkins.com/photography/tutorials/crop_sensor_cameras_and_lenses.html Title: Re: New lens for my 20D Post by: 2_Rastas on September 25, 2008, 04:54:22 PM I guess I was hoping to get a faster aperture than a f2.8. I guess such a lens doesn't exist?
Would I be better off with the Canon 10-22mm f/3.5-4.5? I know it's not as fast but what do you think? O well. Title: Re: New lens for my 20D Post by: marcfs on September 25, 2008, 08:19:58 PM How are you planning to use the lens? Indoors? Landscapes? People?
Your use will impact the reccomendation. Marc Title: Re: New lens for my 20D Post by: Bob Atkins on September 25, 2008, 11:20:25 PM Oh yes, you can get a faster lens. That would be the Canon EF 24/1.4L (http://www.amazon.com/exec/obidos/ASIN/B00009R6WS/bobatkinsphotogr) if you have well over $1100 to spend on a lens.
There's also a decent Sigma 24/1.8 (http://www.amazon.com/exec/obidos/ASIN/B00005RKSO/bobatkinsphotogr) at a much lower price (under $400). It has full frame coverage and is "digitally optimized" whatever that's supposed to mean (probably better optimized anti-reflection coatings) Title: Re: New lens for my 20D Post by: 2_Rastas on September 26, 2008, 02:56:24 PM Wow, that's one heck of a price difference!
Title: Re: New lens for my 20D Post by: Bob Atkins on September 26, 2008, 03:09:49 PM Well, you get what you pay for. The Canon is a "L" series lens with a fast ring USM focusing system and it's 2/3 stop faster than the Sigma. "L" lenses have preium optics and professional grade construction.
The Sigma lens is good, but it's optically slower by 2/3 stop, has a slower. noisier focusing system and it's not quite as sturdily built, though it's no doubt sturdy enough for all normal use. |