Infrared Help Please (2 pics with 5700)
Thank you ookpik for the accurate info! nt
ookpik
wrote:
Kamran,
Curiosity got the better of me, so I e-mailed H&H. According to
one of them, Will Harrison,
"89-B: Absorbs visual below 670mu (Passes 30mu of visual)
"88-A: Absorbs energy below 710mu (Cuts all visual + 10mu of the
near IR equal to the R72)
"87: Absorbs energy below 730mu (Cuts all visual +30mu of the near
IR)"
Not sure of the units used by Will, but there appears to be a "50
nm window" between H&H's 89b and Hoya's R72. That would make the
R72 more of a "true" IR filter but, as your photographs show, the
89b may be more suitable.
ookpik
Kamran
wrote:
ookpik
wrote:
Is it possible that all "89b" filters are not created equal? Which reminds >
me, where did you get your 89b filter?
I guess it's very much possible. I bought mine from Harrisson &
Harrison. The build quality of the filter is not as good as that of
Hoya, but still works for me. They manufacture filters in their own
lab (sounds a small company). Therefore it's possible that it's not
actually 89b (They called it 89b so I call it).
Post
(hide subjects)
|
Posted by
|
When
|
|
|
|
Jul 12, 2004
|
|
|
|
Jul 12, 2004
|
|
|
|
Jul 12, 2004
|
|
|
|
Jul 13, 2004
|
|
|
|
Jul 13, 2004
|
|
|
|
Jul 12, 2004
|
|
|
|
Jul 13, 2004
|
|
|
|
Jul 13, 2004
|
|
|
|
Jul 13, 2004
|
|
|
|
Jul 13, 2004
|
|
|
|
Jul 13, 2004
|
|
|
|
Jul 14, 2004
|
|
|
|
Jul 14, 2004
|
|
|
|
Jul 16, 2004
|
|
|
|
Jul 19, 2004
|
|
|
|
Jul 13, 2004
|
|
|
|
Jul 13, 2004
|
|
|
|
Jul 13, 2004
|
|
|
|
Jul 13, 2004
|
|
|
|
Jul 16, 2004
|
|
|
|
Jul 19, 2004
|
|
Keyboard shortcuts:
FForum
PPrevious
NNext
WNext unread
UUpvote
SSubscribe
RReply
QQuote
BBookmark
MMy threads
Color scheme?
Blue /
Yellow
|
|
|
|
Nov 25, 2020
|
Jun 8, 2020
|
May 21, 2020
|
Apr 18, 2020
|
The Insta360 One R is a unique action camera: it has interchangeable camera modules, including one with a large 1"-type sensor and a Leica lens. We show you how it works and ask, 'who's it for'?
Exposure X6 is the latest Adobe Lightroom competitor from Exposure Software. With great image quality, impressive speed and powerful features, it's a compelling option that doesn't require a monthly subscription.
Sigma's 35mm F2 DG DN designed specifically for mirrorless cameras is a compact, well-built lens that produces lovely images. Is it a good fit for you? Find out in our field review.
US manufacturer Really Right Stuff just released a new lightweight travel tripod, aimed at active and weight-conscious photographers that don't want to compromise on quality. Does its performance justify its high price? Find out in our initial review.
Fujifilm's latest X-S10 is a likeable mirrorless camera with some of the company's best tech packed inside, and it doesn't cost the earth. We think it could be a good fit for photographers of all kinds – find out more in our full review.
Whether you make a living out of taking professional portraits, or are the weekend warrior who knows their way around flashes and reflectors, you'll want a camera with high resolution, exceptional autofocus and a good selection of portrait prime lenses. Click through to see our picks.
What's the best camera for shooting landscapes? High resolution, weather-sealed bodies and wide dynamic range are all important. In this buying guide we've rounded-up several great cameras for shooting landscapes, and recommended the best.
What’s the best camera costing over $2500? The best high-end camera costing more than $2000 should have plenty of resolution, exceptional build quality, good 4K video capture and top-notch autofocus for advanced and professional users. In this buying guide we’ve rounded up all the current interchangeable lens cameras costing over $2500 and recommended the best.
What's the best camera for travel? Good travel cameras should be small, versatile, and offer good image quality. In this buying guide we've rounded-up several great cameras for travel and recommended the best.
There are a lot of photo/video cameras that have found a role as B-cameras on professional productions or A-camera for amateur and independent productions. We've combed through the options and selected our two favorite cameras in this class.