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FORUMS Photo Sharing & Visual Enjoyment Astronomy & Celestial
Thread started 19 Aug 2017 (Saturday) 15:26
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ND filter instead of solar filter for Eclipse

 
bamatt
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Aug 19, 2017 15:26 |  #1

Is this advisable? I have a Promaster variable NDX.


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FPP
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Aug 19, 2017 19:28 |  #2

No. Not safe for you if looking through the viewfinder and probably not safe for your camera either. The ND filter is not nearly as strong as a solar filter.


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Davenn
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Post has been edited 3 months ago by Davenn.
Aug 20, 2017 18:50 |  #3

bamatt wrote in post #18431892 (external link)
Is this advisable? I have a Promaster variable NDX.

no it isnt, I agree with FPP

a proper solar filter from say 1000 Oaks or similar place, knocks out around 99% or more of the light
across the spectrum IR - Vis - UV


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gjl711
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Aug 20, 2017 19:05 |  #4

THe camera is not harmed by UV but too much IR can cause problems like melting plastic. If your shooting tethered or through LV and the filter get dark, like 9 stops or so, then it will work fine. As mentioned above, I would definitely not look through the VF even with the filter on.


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Celestron
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Aug 20, 2017 21:47 |  #5

gjl711 wrote in post #18432767 (external link)
THe camera is not harmed by UV but too much IR can cause problems like melting plastic. If your shooting tethered or through LV and the filter get dark, like 9 stops or so, then it will work fine. As mentioned above, I would definitely not look through the VF even with the filter on.


Have you ever shot any kind of eclipse with the technique your talking about ? Have you shot an eclipse at all of any kind ?




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CyberDyneSystems
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Aug 20, 2017 23:37 |  #6

bamatt wrote in post #18431892 (external link)
Is this advisable? I have a Promaster variable NDX.


Your thread on the same subject posted the day before;
http://photography-on-the.net ...hp?t=1485181&goto=n​ewpost


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gjl711
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Aug 22, 2017 11:01 |  #7

Celestron wrote in post #18432861 (external link)
Have you ever shot any kind of eclipse with the technique your talking about ? Have you shot an eclipse at all of any kind ?

I've only been lucky enough to shoot 2 solar eclipses but what the OP is asking is nothing unique to an eclipse. It's shooting the sun and I have shot the sun with various filters and without filters probably hundreds of times. What do you want to know?


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Celestron
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Aug 22, 2017 12:18 as a reply to gjl711's post |  #8

What do your images look like ?




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gjl711
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Aug 22, 2017 14:11 |  #9

Celestron wrote in post #18434150 (external link)
What do your images look like ?

It depends on the image I guess, but the OP was asking if it's ok to shoot the sun with a variable ND and my response was in response to that question. For tethered shooting/LV shooting, a strong ND works well. No way would I look through the VF though.

This one was without any filter, just nekid lens.

IMAGE: https://c1.staticflickr.com/5/4421/35927151193_8c3c73bdf0_b.jpg

This was with a GND filter.

IMAGE: https://c2.staticflickr.com/4/3945/15426693547_d842b11372_b.jpg

And this one with a solar filter.

IMAGE: https://c1.staticflickr.com/5/4366/35865176703_e1f03f5755_b.jpg

Not sure why, but call me JJ.
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mjcarson
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Sep 15, 2017 10:35 |  #10

A friend of mine has stacked ND and shot an eclipse (done it twice now in fact). First time I was there and he stacked at least 3 ND filters (don't remember the total factor of all three, probably a couple 2x and 3x ND's) and the last time he used a 10. Camera and his eyes survived. I recommended to him not to do it the first time, but he did anyway. No damage to his eyes (that we know of) or the camera. Still, I would not do it. I looked up the frequencies most ND block and they seem to not drop off as you pass into IR, so I suppose stacking them is fine, if you stack enough, but again, I would not do it but I have a solar filter so I don't need to.


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mtbdudex
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Sep 15, 2017 12:53 |  #11

Well nows the time to buy solar filters on sale !!!! ;-)a


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ND filter instead of solar filter for Eclipse
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