Comments on: Understanding camera lens, for beginners

By: Yashveer

Yashveer — Mon, 10 May 2010 13:26:13 +0000

Hi,
Very informative indeed. I now have a better understanding about lens especially when talking about 18-55 or 70-300mm. The image is clearer in my mind.

Thanks

yash

By: Sienna Richardson

Sienna Richardson — Mon, 10 May 2010 05:57:24 +0000

the best Telephoto lens that i have used on an SLR is the Canon EF 70-200 F/2.8 lens. Best image quality ever.*~`

By: Yashvin

Yashvin — Sun, 21 Mar 2010 16:23:28 +0000

@Eddy : Thanks for reading and correcting that point

@Nav : Of course not. I am always open for suggestions and comments.
hmm. Don’t worry, I planned to write about this specific new lens of mine because I noticed that there are only a few articles about this lens, with some real pictures. I will use the same post to introduce these terms you mentioned

Keep tuned to yashvinblogs!

By: Eddy Young

Eddy Young — Sun, 21 Mar 2010 13:37:54 +0000

You made a mistake with your explanation of the f/2.8 lenses. It’s not they have a single aperture, but that they can open to that aperture over the entire focal length range. They are called fast lenses (as compared to the normal zoom lenses whose maximum apertures vary depending on the focal length).

Eddy.

By: Nav

Nav — Sat, 20 Mar 2010 21:55:47 +0000

A nice, well written post. I hate it when people try to explain focal length/ aperture settings without diagrammatic/photographic aids, so it’s great that you haven’t done that have included images.

You used the 70-300mm f/4-5.6 AF Di LD Macro in your article. Some readers might ask what do the bits after,”AF Di LD Macro”, mean? And is it important.
Macro, Telephoto, Wide-angle lens are quite different
Hope you don’t mind the constructive criticism!

By: Kunal

Kunal — Sat, 20 Mar 2010 18:49:30 +0000

lol!!!!

By: Yashvin

Yashvin — Sat, 20 Mar 2010 18:18:15 +0000

@Kunal : Ki tone faire kunal!
Dimoune cpv al zette lecorps tout la avec sa explication la
ABC pas encore apprane, to pu faire zotte ouvert encyclopedie tout

Thanks toujours

By: Kunal

Kunal — Sat, 20 Mar 2010 18:11:29 +0000

Yashvin, you are missing a detail, some cameras are not full frame, so when you calculate the zoom, you need to multiply it by the crop factor. So my 100-400mm lens would have: 400/100 = 4 * 1.6 (1.6 for canon)

that 1.6 is called the focal multiplier

which gives me 6.4x But as you see, its not much of a zoom, but remember its starting zoom position is at the 100mm. So we tend to disregard the zoom in terms of x on an slr camera and only refer tothe maximum reach, which is the second number, and multiply that number by the crop factor, to get an estimate of what a 35mm would require to capture an image at that same depth.

hope I didnt confuse you lol

By: Mike

Mike — Sat, 20 Mar 2010 17:38:00 +0000

This is an interesting post and straight to the point. Good reference points.

By: Chaya

Chaya — Sat, 20 Mar 2010 15:50:30 +0000

Nice post. The first two lines were scary though
Got to learn a little bit about camera lenses