School me on Solar Eclipses and filters

[Deleted Member 777]

This thread was started by a former member. Let's not disappoint them and keep it going

 

[iamdlewis]

I have never done this but will be heading to Dallas for a try, nice to have a friend that lives in the line of totality. You being much further north will naturally have a greater chance of cloud cover for the day.

A video I found that helps answer all the questions you might have: Preparing for the 2024 Total Solar Eclipse, Part 1. Part 2 is all about the day of and location advise.

This is the filter paper that I have seen people mention in multiple videos and this is the smallest size that will fit over the 100-400 or 200-600 lens Baader AstroSolar ECO-size (B&H does seem to have the cheapest price)- You will have some slight arts and crafts to custom make the filter.

 

[AlphaWorld]

Lens Rentals has a few articles on the subject, and some horrifying shots of what can happen to your gear if you don't do the right things:

Rental Camera Gear Destroyed by the Solar Eclipse of 2017

We recently had quite a spectacle in the United States, with a Solar Eclipse reaching totality throughout a large portion of the United States. Being that this was the first solar eclipse passing through the Continental US since 1979, excitement ran wild on capturing this natural event using the...

www.lensrentals.com

Guide to Photographing The Solar Eclipse on August 21st 2017

On August 21st, 2017, a solar eclipse will be happening throughout the United States, which has created a lot of excitement and questions from our readers and customers. As a result, I wanted to put together a small guide on how to properly and safely photograph this incredibly rare event. Let’s...

www.lensrentals.com

Apparently ND filters are not enough - you do need a solar filter.

The shot of the 600mm lens with a melted aperture diaphragm - eeeesh!

 

[GvilleRick]

I bought a 4"x4" sheet of solar filter off of Amazon and used an old UV filter to create a solar filter. I used sugru around the edge of the filter to keep the filter in place. Here is the composite of the shots I got during the 2017 eclipse that passed directly over us in South Carolina. My daughter lives in Texas directly in the center of the path for this one so we are visiting then. This eclipse should last almost twice as long as the one in 2017. It is an impressive sight.

I also purchased a different sheet of solar filter that provides a white light. Here is a composite shot of the ISS passing in front of the sun.

• PENTAX K-1 Mark II
• smc PENTAX-DA* 300mm F4 ED [IF] SDM
• 300.0 mm
• ƒ/5.6
• 1/1000 sec
• ISO 100

 

[Alan Clark]

First, you cannot damage your eyes by looking at the electronic viewfinder, any more than you can damage your eyes by looking at a photo of the sun on your computer! Damage to the sensor is another matter, but using a small aperture would reduce the risk, and using the camera on a tripod would increase the risk by keeping the heat constantly in the same position. If you hand-hold then the image will move around the frame, reducing any heat build-up.
Secondly, however you photograph it you can check what your results will be like by photographing the uneclipsed sun. The disk of the sun will be the same brightness during the partial eclipse.
As your totality is 95% you must be within reasonable travelling distance of the path of totality, so I would certainly consider making the journey.

 

[Angus Cameron]

You may find this useful https://www.photopills.com/articles/solar-eclipse-photography-guide

 

[GvilleRick]

That's pretty badass!

Describe a bit better, please. Did you use the sugru to hold the filter paper on the lens, or on an old filter frame?

Thanks! Those were taken with my Pentax K1ii. I'm looking forward to shooting with the a7RV.

I used an old UV filter and cut the solar filter paper to fit inside the UV filter. I then used the sugru around the filter to seal it and block any light from the edges. I place the filter paper with the silver side facing away from the camera.

• ILCE-7RM5
• SAMYANG AF 35-150mm F2-2.8
• 150.0 mm
• ƒ/8
• 1/125 sec
• ISO 2500

Here is a shot I took a few minutes ago to check it out again. Since I created it using it using an 86mm filter and the Sony 200-600 uses a 95mm I purchased a 86mm-95mm adapter rather than make a new one.

• ILCE-7RM5
• FE 200-600mm F5.6-6.3 G OSS
• 600.0 mm
• ƒ/8
• 1/640 sec
• ISO 400

Once the eclipse reaches totality you can remove the filter and shoot directly. I'm glad that there will be over 4 minutes of totality since it will allow time to switch lenses, add a TC, etc. to get additional shots.

I'm really hoping for clear weather but if it is cloudy you can actually use the clouds as a filter. I took this shot of the eclipse from last October without a filter.

• ILCE-7RM5
• FE 200-600mm F5.6-6.3 G OSS
• 600.0 mm
• ƒ/18
• 1/8000 sec
• ISO 50

 

[AlphaWorld]

The filter membrane or whatever it is came yesterday. I wanted to get the frame constructed just in case I messed something up, there'd be time for an alternative.

They give you instructions to build the frame, but I already had everything needed to do what I had planned, except Kleenex. The barrel of the filter frame is a carboard oatmeal cannister, lined with black posterboard and fitted with spacers to keep it centered on the lens. The filter frame is a piece of black foam presentation board, cut to size, with another piece of black posterboard for the top. Other materials included Scotch brand two sided and single sided cellophane tape, and gorilla tape.

The frame seems awfully big, but they recommended 4" larger than the lens element.

View attachment 55834

The film looks loose, and I have no idea how it's optically perfect, but this looks exactly like their example images. They warn you several time not to stretch it or pull it taught. You cut the material, set it on the aforementioned Kleenex that has been stretched smooth and taped to a table, and 'drop' your frame with two-sided tape onto the filter material.

View attachment 55835

Here it is on the lens. Totally cheesy! I was thinking about covering the outside with more black posterboard, then thought "Heck No!" it'd ruin the vibe!

View attachment 55836

So, there it is. I'll try it out next sunny day we get and see how it works. Who knows? Maybe I'll enjoy sun photography and get a real solar filter. For now, this is good. I have the protective paper that it was shipped in taped over the filter material on both sides to keep dust off and protect it from scratches. It is currently living in my safe, fragile as it is.

Oh, yes, you have use it exactly like that! You'll get so many questions about it you won't get a lot of shooting time, but it's cool!

 

[iamdlewis]

First forecast, 14 days away. It means nothing!

View attachment 57786

Reminds me of the most true forecast I had last summer

 

[iamdlewis]

Finally finalized my filter design. Nothing fancy but it is simple and it will be easy to pack, which is key since I need to travel by plane. I went with a Staples Poly 2-Pocket Presentation Folder (thin, block 100% of the light and "weather proof") as the bread for the AstroSolar Safety Film and ring with cotton balls as the material to tighten the hold on the lens. Once I get to my destination I will make the more secure than what is shown.

 

[iamdlewis]

Helpful websites:
Solar Eclipse Time Exposure Calculator - linky
Interactive map - linky

Exposure Calculator find the location on the map and find the ALT value of the sun

Input that value into the Altitude of the Sun

Select your aperture. If you are using one of the Solar Filters it is most likely the ND 5.0 value that you will use but check the documentation of the filter.

 

[FowlersFreeTime]

Hey Tim, any luck with the eclipse?

 

[iamdlewis]

Don't know how Tim did but I had some luck.
Here is first image in which one could tell the moon started blocking the sun.

• ILCE-1
• Sony FE 200–600mm F5.6–6.3 G OSS (SEL200600G)
• 300.0 mm
• ƒ/11
• 1/400 sec
• ISO 100

One about 33%

• ILCE-1
• Sony FE 200–600mm F5.6–6.3 G OSS (SEL200600G)
• 300.0 mm
• ƒ/11
• 1/400 sec
• ISO 100

~96%

• ILCE-1
• Sony FE 200–600mm F5.6–6.3 G OSS (SEL200600G)
• 300.0 mm
• ƒ/11
• 1/5 sec
• ISO 100

Totality

• ILCE-1
• Sony FE 200–600mm F5.6–6.3 G OSS (SEL200600G)
• 300.0 mm
• ƒ/11
• 1/40 sec
• ISO 100

• ILCE-1
• Sony FE 200–600mm F5.6–6.3 G OSS (SEL200600G)
• 300.0 mm
• ƒ/11
• 1/160 sec
• ISO 100

• ILCE-1
• Sony FE 200–600mm F5.6–6.3 G OSS (SEL200600G)
• 300.0 mm
• ƒ/11
• 1/100 sec
• ISO 100

Last bit of totality

• ILCE-1
• Sony FE 200–600mm F5.6–6.3 G OSS (SEL200600G)
• 300.0 mm
• ƒ/11
• 1/400 sec
• ISO 100

Like 15% cover as it moves past and the last photo I took as a long p

• ILCE-1
• Sony FE 200–600mm F5.6–6.3 G OSS (SEL200600G)
• 300.0 mm
• ƒ/11
• 1/25 sec
• ISO 100

eriod of thick clouds moved in.

 

[FowlersFreeTime]

Those totality shots are pretty good @iamdlewis

 

[Richard A]

I can't say that I have seen any better shots than those anywhere!