I want to use a Pinhole camera
for safe viewing live view
and burn some X-Ray
any advice!
I want to use a Pinhole camera
for safe viewing live view
and burn some X-Ray
any advice!
Tin Can
Just make sure that you nail the focus! ��
I made a hole in tin-foil with a pin. Then used an on-line pinhole f-stop calculator to figure the aperture based on the extension of my 8x10 Shen-Hao.
I used the top of a film box as a shutter. The cereal box was the viewer, there is a pinhole in tin-foil attached to the box and it projects the image of the sun inside the box for viewing.
Even with that maximum extension of my Shen-Hao, and after enlarging the negative to 11x14, the sun was only as big as a dime on the print.
This was the partial eclipse from 2017 and it was an overcast day. I exposed about 5 sheets and at this moment, there was a circular opening in the clouds. Pretty amazing.
I don't recall the exposure, but you can see the clouds moving. I suspect for the next eclipse, with the same setup, the exposure will need to last the entire of totality, a couple minutes probably.
The best way to view the eclipse is to go to NASA's site on YouTube and watch it on your TV. It's rather late now to get set up to photograph it. However, there's still time to get ready for next year's eclipse. I've photographed a solar eclipse with a 25 foot long pinhole camera, although using a more moderate telephoto lens on a camera is far more convenient if you plan ahead to get an appropriate solar filter and practice solar photography long before the day of an eclipse.
You can also use a regular LF lens...just set infinity focus first, then stop your lens down a bit (f/32-ish), then move your camera around while viewing the screen obliquely (you'll see the eclipse just fine), and you'll be perfectly safe! I did this a few years back while on the road with my 4x5 - stopped in a parking lot and pointed the camera skyward...got a great view!
Edit - my suggestion is just for viewing, while a filter would likely be needed (as suggested above) to make a good photograph with a glass lens.
Thanks guys
Today is overcast, no Sun
I have new filters from 2007 and we had a perfect view on my lawn that time
I moved here FOR the Eclipses
April 8, 2024 is the big one again
Tin Can
We have clear skies. The light level is -3EV in my estimation.
The critters know
They ALL get quiet
Wind drops
Tin Can
Bookmarks