24mm F2.8 and 20mm F1.8 any big differences?

Redkangoo · 6th July 2008

Just checking beside sharper because of the aperture opening bigger, any significant differences? Owners for this 2 lens, please help to feedback
Thanks

Kit · 6th July 2008

Erm.... isn't it obvious?? The focal length is different. And if you are referring to Canon, they don't make a 20mm f/1.8.

Redkangoo · 6th July 2008

sorry is 28mm F1.8 vs 24mm F2.8 and now also 50mm F1.4

Look like the effec the same for 1.6crop

contaxable · 6th July 2008

Have you tried 24 f1.4? You might fall in love with it.

charlesleong · 7th July 2008

price is slightly prohibitive though for the 24 1.4

Redkangoo · 7th July 2008

wow i think i shld get the 10-22 to compare and also a macro lense already. enough of the F1.4 and F1.8 and 24mm F2.8 and 28mm F1.8

calebk · 8th July 2008

Originally Posted by Redkangoo

sorry is 28mm F1.8 vs 24mm F2.8 and now also 50mm F1.4

Look like the effec the same for 1.6crop

What do you mean the effect is same? They are entirely different focal lengths, all with different maximum aperture.

unseenshadows · 8th July 2008

How about - different lenses are different.

happyshot · 8th July 2008

a 28mm 1.8 on a 400D = is really about 45mm= moderate, standard, can handhold indoors w/o flash, can use on full frame.
a 50mm 1.4-1.8 on a 400D = is really about 80mm= not very wide, pretty tight, borderline handheld indoors unless you bump up ISO and grain, can use on full frame.

10-22 on a 400D = wide, but slow, probably cannot handhold indoors unless you lug a flash along or it is very very VERY well lit, and cannot use on a full frame.

as discussed in private messages i have the 28mm 1.8 and it is great indoors w/o flash. even though i am selling it, i am not trying to get you to buy it. the point of this exercise is to understand what each lens is capable of and how you can/cannot use it so that we all have a "happyshot"

remember, if you are using a 400D (i think) your camera is a 1.6 crop meaning whatever lens you put on, you must multiply that by 1.6 and that will give you your true focal length. if you are looking at the 10-22 and have a flash, I would rather go for the 17-40mm 4.0 L.

It starts out roughly in the middle of the focal length of the 10-22mm, you get a bit zoom on it, the quality is better (IMHO) and if you upgrade camera bodies, you in effect have the same focal distance as a 10-22 on a 400D. a 10-22 on a 400D distance wise is really a 16-35mm lens... hmmmm, doesn't canon also make a 16-35

just know what you want to use the lens for. 10-22 is not a low-light lens
17-40mm is not a low-light lens
50mm 1.4 and 28mm 1.8 are both low-light lenses. they let in more light in darker places allowing for higher shutter speeds to freeze motion and take away handshake.
hope this helps, happy shooting

Redkangoo · 9th July 2008

Thanks, bought the 10-22 for landscape and F1.4 for portraits. The 24mm F2.8 is just testing...

moos blues · 10th July 2008

consider also that other than FOV and Angle of view and focal lengths...

Lenses at carry a specific perspective as well, I personally dislike the 20mm perspective given to pictures and prefer 24mm one.

this also has to do with the characteristic of that particular lens and the distortion it has.

hope thats one more factor you want to look at.

and yes it carries this trait on to pictures from cropped sensors.

6th July 2008	#1
Redkangoo Member Join Date: Jun 2008 Location: Bukit Panjang Posts: 385	24mm F2.8 and 20mm F1.8 any big differences? Just checking beside sharper because of the aperture opening bigger, any significant differences? Owners for this 2 lens, please help to feedback Thanks __________________ Canon 50D,10-22mm,16-35mm F2.8 L MK1,18-200mm IS, 580EXII

6th July 2008	#2
Kit Senior Member Join Date: Jan 2002 Location: Bukit Timah / Melbourne CBD Posts: 6,031	Re: 24mm F2.8 and 20mm F1.8 any big differences? Erm.... isn't it obvious?? The focal length is different. And if you are referring to Canon, they don't make a 20mm f/1.8. __________________ arkitectural photography http://arkitecturalphoto.1x.com/

6th July 2008	#3
Redkangoo Member Join Date: Jun 2008 Location: Bukit Panjang Posts: 385	Re: 24mm F2.8 and 20mm F1.8 any big differences? sorry is 28mm F1.8 vs 24mm F2.8 and now also 50mm F1.4 Look like the effec the same for 1.6crop __________________ Canon 50D,10-22mm,16-35mm F2.8 L MK1,18-200mm IS, 580EXII

6th July 2008	#4
contaxable Member Join Date: Mar 2006 Posts: 264	Re: 24mm F2.8 and 20mm F1.8 any big differences? Have you tried 24 f1.4? You might fall in love with it.

7th July 2008	#5
charlesleong Member Join Date: Sep 2007 Posts: 1,073	Re: 24mm F2.8 and 20mm F1.8 any big differences? price is slightly prohibitive though for the 24 1.4

8th July 2008	#8
unseenshadows Member Join Date: Oct 2007 Location: Marine Parade, Singapore Posts: 718	Re: 24mm F2.8 and 20mm F1.8 any big differences? How about - different lenses are different. __________________ I shoot film.

8th July 2008	#9
happyshot Deregistered Join Date: May 2008 Posts: 63	Re: 24mm F2.8 and 20mm F1.8 any big differences? a 28mm 1.8 on a 400D = is really about 45mm= moderate, standard, can handhold indoors w/o flash, can use on full frame. a 50mm 1.4-1.8 on a 400D = is really about 80mm= not very wide, pretty tight, borderline handheld indoors unless you bump up ISO and grain, can use on full frame. 10-22 on a 400D = wide, but slow, probably cannot handhold indoors unless you lug a flash along or it is very very VERY well lit, and cannot use on a full frame. as discussed in private messages i have the 28mm 1.8 and it is great indoors w/o flash. even though i am selling it, i am not trying to get you to buy it. the point of this exercise is to understand what each lens is capable of and how you can/cannot use it so that we all have a "happyshot" remember, if you are using a 400D (i think) your camera is a 1.6 crop meaning whatever lens you put on, you must multiply that by 1.6 and that will give you your true focal length. if you are looking at the 10-22 and have a flash, I would rather go for the 17-40mm 4.0 L. It starts out roughly in the middle of the focal length of the 10-22mm, you get a bit zoom on it, the quality is better (IMHO) and if you upgrade camera bodies, you in effect have the same focal distance as a 10-22 on a 400D. a 10-22 on a 400D distance wise is really a 16-35mm lens... hmmmm, doesn't canon also make a 16-35 just know what you want to use the lens for. 10-22 is not a low-light lens 17-40mm is not a low-light lens 50mm 1.4 and 28mm 1.8 are both low-light lenses. they let in more light in darker places allowing for higher shutter speeds to freeze motion and take away handshake. hope this helps, happy shooting

9th July 2008	#10
Redkangoo Member Join Date: Jun 2008 Location: Bukit Panjang Posts: 385	Re: 24mm F2.8 and 20mm F1.8 any big differences? Thanks, bought the 10-22 for landscape and F1.4 for portraits. The 24mm F2.8 is just testing... __________________ Canon 50D,10-22mm,16-35mm F2.8 L MK1,18-200mm IS, 580EXII

10th July 2008	#11
moos blues Member Join Date: Nov 2003 Location: Pasir ris Posts: 681	Re: 24mm F2.8 and 20mm F1.8 any big differences? consider also that other than FOV and Angle of view and focal lengths... Lenses at carry a specific perspective as well, I personally dislike the 20mm perspective given to pictures and prefer 24mm one. this also has to do with the characteristic of that particular lens and the distortion it has. hope thats one more factor you want to look at. and yes it carries this trait on to pictures from cropped sensors.