Venus Transit - NDX + IR 72 filters?
Jun 1, 2012 22:54:16 #
OK, it's almost here so I'm asking this question now. By severe procrastination, I never bought the Solar filter I researched months ago so...I'm stuck.
How safe will I be if I use both my Promaster NDX filter AND my Hoya IR (R72) filters?
Good? Not good?
How safe will I be if I use both my Promaster NDX filter AND my Hoya IR (R72) filters?
Good? Not good?
Jun 2, 2012 02:06:32 #
Jun 2, 2012 07:19:59 #
St3v3M wrote:
Snapfilter suggests a ND9 filter is enough (around 7:25)
http://www.youtube.com/watch?v=TglLUyTIQT0
http://www.youtube.com/watch?v=TglLUyTIQT0
I saw that video yesterday which is where I got the idea from. However, I was doing some Yahoo research and that's not the general opinion. I'm probably spinning my wheels anyway because I think it's supposed to rain. :(
Jun 2, 2012 07:44:19 #
Indi wrote:
I'm probably spinning my wheels anyway because I think it's supposed to rain. :(
I'm afraid you're right about that. Our forecast up here is for rain on and off for the next ten days.
Jun 2, 2012 08:29:12 #
jerryc41 wrote:
I'm afraid you're right about that. Our forecast up here is for rain on and off for the next ten days.
Indi wrote:
I'm probably spinning my wheels anyway because I think it's supposed to rain. :(
I'm afraid you're right about that. Our forecast up here is for rain on and off for the next ten days.
Maybe I'll be lucky as the weather usually goes from Joisey, around the west (Manhattan) and upstate...oops! Sorry Jerry.
Jun 2, 2012 08:41:11 #
Indi wrote:
Maybe I'll be lucky as the weather usually goes from Joisey, around the west (Manhattan) and upstate...oops! Sorry Jerry.
jerryc41 wrote:
I'm afraid you're right about that. Our forecast up here is for rain on and off for the next ten days.
Indi wrote:
I'm probably spinning my wheels anyway because I think it's supposed to rain. :(
I'm afraid you're right about that. Our forecast up here is for rain on and off for the next ten days.
Maybe I'll be lucky as the weather usually goes from Joisey, around the west (Manhattan) and upstate...oops! Sorry Jerry.
We have had lots of rain this spring. I used to live on the south shore of Nassau.
Jun 2, 2012 08:53:31 #
Indi wrote:
OK, it's almost here so I'm asking this question now. By severe procrastination, I never bought the Solar filter I researched months ago so...I'm stuck.
How safe will I be if I use both my Promaster NDX filter AND my Hoya IR (R72) filters?
Good? Not good?
How safe will I be if I use both my Promaster NDX filter AND my Hoya IR (R72) filters?
Good? Not good?
In my quick glance for info on ND range of the Promaster NDX, I get sketchy information. Vivitar's NDX variable ND reaches ND1000, which, like pure ND1000 filters, at 10 stops of Neutral Density, is enough to dim the sun at high shutter speeds. If your Promaster can reach ND1000, it should be enough to allow you to set your lens at f/11, at 1/8000th second, with the ND at ND1000, ten stops.
That said, I DO NOT recommend looking through the camera when dealing with the sun. Use your image preview on your LCD. The sun is easy to find using a tripod and a little moving around.
I shot the recent eclipse a bit differently (there are no variable ND filters for an old 300mm f/2.8 Nikkor) but achieved f/360 using layers of ND gel taped to the front of the lens without lens shade. The gel, combined with the two stops of loss from the matched 2x extender I used on the 300mm to get 600mm plus 1.5 DX crop... 900mm... Results below.
Sun Tamed
Sun Spots during the Eclipse Means Venus would easily show well
Jun 2, 2012 09:29:37 #
PhotoArtsLA wrote:
quote=Indi OK, it's almost here so I'm asking thi... (show quote)
I see the results...excellent! I'm jealous.
I have a 150-500mm but filters for that big boy will cost over $100. More for a solar filter. So, I'll only be using my 55-200mm.
Not expecting miracles...just something recognizable.
What about my IR filter? Any thoughts about that?
Sorry, my responses got mixed with your text in the quoted area.
Jun 2, 2012 09:32:54 #
jerryc41 wrote:
We have had lots of rain this spring. I used to live on the south shore of Nassau.
Indi wrote:
Maybe I'll be lucky as the weather usually goes from Joisey, around the west (Manhattan) and upstate...oops! Sorry Jerry.
jerryc41 wrote:
I'm afraid you're right about that. Our forecast up here is for rain on and off for the next ten days.
Indi wrote:
I'm probably spinning my wheels anyway because I think it's supposed to rain. :(
I'm afraid you're right about that. Our forecast up here is for rain on and off for the next ten days.
Maybe I'll be lucky as the weather usually goes from Joisey, around the west (Manhattan) and upstate...oops! Sorry Jerry.
We have had lots of rain this spring. I used to live on the south shore of Nassau.
I think you mentioned that to me before. I live in Pt. Lookout, across Jones Inlet from JB.
I used to go upstate a lot when I was a kid. My grandfather had a blacksmith shop in Ferndale near Grossingers.
Jun 2, 2012 09:52:53 #
Indi wrote:
OK, it's almost here so I'm asking this question now. By severe procrastination, I never bought the Solar filter I researched months ago so...I'm stuck.
How safe will I be if I use both my Promaster NDX filter AND my Hoya IR (R72) filters?
Good? Not good?
How safe will I be if I use both my Promaster NDX filter AND my Hoya IR (R72) filters?
Good? Not good?
Blindness, and eye damage caused by looking at the sun is caused by UV. A IR filter does not stop thses wave lenths. To by safe use a welder glasses with #14 glass or look at the LCD screen on the camera and not through the viewfinder
Jun 2, 2012 12:47:55 #
Indi wrote:
quote=PhotoArtsLA quote=Indi OK, it's almost her... (show quote)
If you have a store nearby which sells Lee or Matthews Gel, you can get ND9 gel sheets, cut them to size, stack them up, and get your massive ND going, not for too much cash. I tape the gel close to the lens (no sun shade or hood) which minimizes distortion.
You could always just get the gel online.. B&H and Filmtools sell gel online.
As to the IR, if you are getting enough f/stop with the Variable ND, it might not be needed, but it might be interesting to see if it makes an imaging difference. You might get better color. DSLRs tend to exaggerate the infrared.
Good shooting,
Richard Brown
Good luck!
Richard Brown
Jun 2, 2012 14:12:53 #
Has anyone tried stacking 2 polorizes and rotate until maixum density and use liveview to focus and view. I did this with the last eclipse and it worked o.k. I still have my eyesite and it didn't seem to affect my camera sensor (Nikon D5000 using 70-300mm).
Jun 2, 2012 14:47:50 #
Eugene G Campbell wrote:
Has anyone tried stacking 2 polorizes and rotate until maixum density and use liveview to focus and view. I did this with the last eclipse and it worked o.k. I still have my eyesite and it didn't seem to affect my camera sensor (Nikon D5000 using 70-300mm).
I don't think that 2 CPLs are as dark as one ND filter, bu if it worked, who's to argue.
Can't you still see what I'm writing? Lol.
Jun 2, 2012 14:50:29 #
OK. Just came back from Home Depot. Only place I know where I could get welding glass. I bought a mask, made in China with no rating, and an extra glass rated #10. Stacking the mask and the glass should do the trick.
Any opinions?
Any opinions?
Jun 2, 2012 16:20:19 #
Indi wrote:
OK. Just came back from Home Depot. Only place I know where I could get welding glass. I bought a mask, made in China with no rating, and an extra glass rated #10. Stacking the mask and the glass should do the trick.
Any opinions?
Any opinions?
Only #14 welder glass is safe. Stacking still lets thru the light that can damage your retina - and you won't know it until it's too late. Same goes for stacking polarizing filters.
Here are NASA's guidelines on the subject
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