Choosing A Lens.

xoxoxoBruce · 06-13-2007, 07:29 PM

Someone in Belgium posted these pictures on Wunderground. They show the results of different lens choices on the same scene. Might be helpful to someone other than myself, also.

xoxoxoBruce · 06-13-2007, 07:30 PM

and

lumberjim · 06-13-2007, 07:54 PM

jinx's good lens is 18-200. what do you mean 'choosing' a lens?

SteveDallas · 06-13-2007, 08:03 PM

A nice illustration! FWIW 50mm is considered "normal" (i.e. neither wide angle nor telephoto) for 35mm cameras. (I'm not sure if there needs to be a reduction factor in there if you're talking digital SLRs, most of which have a different size sensor.)

If you wanted to buy another one, say. What size would be good to get? Depends on a lot of things. Also that lens you mention is a zoom lens and can take any length between 18 and 200. But some lenses are not zooms and have a single focal length--like the 50mm my old manual camera came with.

Bullitt · 06-13-2007, 08:31 PM

Lenses come in a wide variety of focal lengths LJ, specialized lenses for certain types of subjects such as wide angled lenses for landscape(~20mm and below), and telephoto (long ~300mm and above) for sports and the like.
Long story short, you can get some image distortion at the extremes of either end when using a zoom lens that has a wide range, like jinx's 18-200, but it depends on the lens.
So for me, I am looking to get a Nikon D50 and have two lenses, a 17-55 "walk around" lens, and a 75-300 telephoto for wildlife and sports and the like. What kind and what aperture range is her's if I might ask?

And to steve, yes there is a reduction factor due to the CCD being smaller than the 35mm negative. Example being: my 75-300mm lens will give me images that are like 105-450mm on a film camera.

lumberjim · 06-13-2007, 08:44 PM

her aperture? isn;t that a little personal?

jinx · 06-13-2007, 08:52 PM

1:3.5-6.3

Bullitt · 06-13-2007, 09:13 PM

Quote:

Originally Posted by lumberjim

her aperture? isn;t that a little personal?

Sorry, got a little excited there

xoxoxoBruce · 06-14-2007, 06:03 PM

Probably less helpful but shows the difference in background, of the same subject, with different lenses.

xoxoxoBruce · 06-14-2007, 06:05 PM

Also f-stop on the depth of field. Larger f-stop more stuff in focus.

glatt · 06-15-2007, 08:37 AM

Quote:

Originally Posted by xoxoxoBruce

Probably less helpful but shows the difference in background, of the same subject, with different lenses.

It would have been interesting with this one if they had also listed the distance of the object from the camera. To keep the object the same size in the image at all those different focal lengths, they had to take the shot from really far away at the long focal length, and move in real close at the short focal length.

fargon · 06-15-2007, 09:49 AM

In my experience, using a smaller aperture (higher F-stop number) Produces a deeper depth of field. I like to focus on my main subject and have the rest in a blur. I use this technique for portrait and still life. For technical and documentation I will use a larger F-number for a larger depth of field.

My old Minolta X-700 35mm SLR, has served me for years.
I have a 50mm, 28-70mm zoom, and a 400mm Soligor telefoto.
But I use my HP digital more than any thing else.

xoxoxoBruce · 06-15-2007, 03:34 PM

Quote:

Originally Posted by glatt

It would have been interesting with this one if they had also listed the distance of the object from the camera. To keep the object the same size in the image at all those different focal lengths, they had to take the shot from really far away at the long focal length, and move in real close at the short focal length.

I thought the same thing but no, he didn't say.

LabRat · 06-15-2007, 04:06 PM

Very nice Bruce, thanks a lot!!

06-13-2007, 07:29 PM	#1
xoxoxoBruce The future is unwritten Join Date: Oct 2002 Posts: 71,105	Choosing A Lens. Someone in Belgium posted these pictures on Wunderground. They show the results of different lens choices on the same scene. Might be helpful to someone other than myself, also. Attached Images __________________ The descent of man ~ Nixon, Friedman, Reagan, Trump.

06-13-2007, 07:30 PM	#2
xoxoxoBruce The future is unwritten Join Date: Oct 2002 Posts: 71,105	and Attached Images __________________ The descent of man ~ Nixon, Friedman, Reagan, Trump.

06-13-2007, 07:54 PM	#3
lumberjim I can hear my ears Join Date: Oct 2003 Posts: 25,571	jinx's good lens is 18-200. what do you mean 'choosing' a lens? __________________ This body holding me reminds me of my own mortality Embrace this moment, remember We are eternal, all this pain is an illusion ~MJKeenan

06-13-2007, 08:31 PM	#5
Bullitt This is a fully functional babe lair Join Date: Mar 2004 Location: Akron, OH Posts: 2,324	Lenses come in a wide variety of focal lengths LJ, specialized lenses for certain types of subjects such as wide angled lenses for landscape(~20mm and below), and telephoto (long ~300mm and above) for sports and the like. Long story short, you can get some image distortion at the extremes of either end when using a zoom lens that has a wide range, like jinx's 18-200, but it depends on the lens. So for me, I am looking to get a Nikon D50 and have two lenses, a 17-55 "walk around" lens, and a 75-300 telephoto for wildlife and sports and the like. What kind and what aperture range is her's if I might ask? And to steve, yes there is a reduction factor due to the CCD being smaller than the 35mm negative. Example being: my 75-300mm lens will give me images that are like 105-450mm on a film camera. __________________ Kiss my white Irish ass. Last edited by Bullitt; 06-13-2007 at 08:40 PM.

06-13-2007, 08:44 PM	#6
lumberjim I can hear my ears Join Date: Oct 2003 Posts: 25,571	her aperture? isn;t that a little personal? __________________ This body holding me reminds me of my own mortality Embrace this moment, remember We are eternal, all this pain is an illusion ~MJKeenan

06-13-2007, 08:03 PM	#4
SteveDallas Your Bartender Join Date: Jan 2002 Location: Philly Burbs, PA Posts: 7,651	A nice illustration! FWIW 50mm is considered "normal" (i.e. neither wide angle nor telephoto) for 35mm cameras. (I'm not sure if there needs to be a reduction factor in there if you're talking digital SLRs, most of which have a different size sensor.) If you wanted to buy another one, say. What size would be good to get? Depends on a lot of things. Also that lens you mention is a zoom lens and can take any length between 18 and 200. But some lenses are not zooms and have a single focal length--like the 50mm my old manual camera came with.

06-13-2007, 08:52 PM	#7
jinx Come on, cat. Join Date: Nov 2003 Location: general vicinity of Philadelphia area Posts: 7,013	1:3.5-6.3 __________________ Crying won't help you, praying won't do you no good.

06-14-2007, 06:03 PM	#9
xoxoxoBruce The future is unwritten Join Date: Oct 2002 Posts: 71,105	Probably less helpful but shows the difference in background, of the same subject, with different lenses. Attached Images __________________ The descent of man ~ Nixon, Friedman, Reagan, Trump.

06-14-2007, 06:05 PM	#10
xoxoxoBruce The future is unwritten Join Date: Oct 2002 Posts: 71,105	Also f-stop on the depth of field. Larger f-stop more stuff in focus. Attached Images __________________ The descent of man ~ Nixon, Friedman, Reagan, Trump.

06-15-2007, 09:49 AM	#12
fargon Person who doesn't update the user title Join Date: Dec 2005 Location: La Crosse, WI Posts: 8,924	In my experience, using a smaller aperture (higher F-stop number) Produces a deeper depth of field. I like to focus on my main subject and have the rest in a blur. I use this technique for portrait and still life. For technical and documentation I will use a larger F-number for a larger depth of field. My old Minolta X-700 35mm SLR, has served me for years. I have a 50mm, 28-70mm zoom, and a 400mm Soligor telefoto. But I use my HP digital more than any thing else. __________________ Annoy the ones that ignore you!!! I live a blessed life I Love my Country, I Fear the Government!!! Heavily medicated for the good of mankind.

06-15-2007, 04:06 PM	#14
LabRat twatfaced two legged bumhole Join Date: Jun 2004 Posts: 3,143	Very nice Bruce, thanks a lot!! __________________ Strength does not come from how much weight you can lift, or how many miles you can run. It comes from knowing that you set a goal, and rose to the challenge. Strength comes from within.

Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)