![]() ![]() |
Audio Asylum Thread Printer Get a view of an entire thread on one page |
For Sale Ads |
In Reply to: Newbie needs help with lens hood... posted by highfidelity on August 20, 2003 at 23:54:48:
Perfect answer should say all the time. A good lens hood stops stray light from entering the lens onto your image thus causing flare or a loss of image contrast. It also serves as a lens protector for the front of the lens!Now the problem occurs, that there is not, one lens hood length good for all lenes. On a 24mm wideangle , there needs to be a short hood. So as not to intrude into the image (seen thru the lens). Perhaps you've all seen dark corner edges on a print, where the lens sees the hood or shade.
On a longer lens or tele- zoom a long hood is desirable say, 4 to 6 inches covering in front of the lens.
So you can see the zoom lens maker's dilemma. how long can you make a hood . It has to be short for the wideangle portion and never a useful length for your tele. In-order to eliminate glare or flare.
You can compansate by holding your free hand (or piece of paper) over the lens while shooting in open sun. Or find a second longer hood for the times you shoot with the tele 200.
![]()
Follow Ups:
Thanks for the great answer. You explained it very clearly. I have noticed some vignetting on some ofmy prints, but I don't recall whether the hood was on or off on those shots. I guess I need to make some test shots and figure out what works best.Thanks,
JamesPS: I used to have Acoustat Monitor Fours. Great speakers. Only reason I sold them was because my amps were a little finicky and had to get them repaired a lot. Now I'm into horns and have Altec Model 19's.
James
![]()
Vignetting ,will also occur on the corner edges of prints due to more than one filter attached to the front of a lens. I try to purchase thin filter mounts. These unwanted effects can be viewed trough the viewfinder while searching the corners before pushing the shutter.Thanks for your words about Acoustats I will always listen to planars . I've owned these since '78 even as I was employed as a motion picture projectionist building several Altec A 7 horns for theater houses.
![]()
I hadn't thought about the filter. I have a neutral density polarized screwed onto the front. It appears to be a thin mount, but it's easy enough to take off. Thanks again for the insight.
James
![]()
This post is made possible by the generous support of people like you and our sponsors: