This should have been posted before the transit of Venus
but I have been having a hard time finding some time to work on an ible the past few months. Anyway, this ible will show you how to make your own disposable solar filter for your digital camera using materials accessible around your home.
DISCLAIMER: There is no guarantee that this method is safe. However, you can ensure to protect your eyes by using the "digital camera LCD screen" for viewing. As for ensuring the safety of your gadget, all "digital camera sensors" have an IR cut-off filter, and a UV-absorbing thin-film coatings for protection.
Step 1: What you need?
1) Compact Disc – Compact Discs are made of thick polycarbonate plastic and a thin layer of aluminum making it reflective which in return, reflect back excessive light. Moving on to cutting-off the CD, if you are going to cover large lenses, I suggest you use photographic film exposed directly to x-rays. However, there is no guarantee that the use of the following is safe. Since CDs and DVDs only have thin layer of aluminum, some invisible variables such as IR and UV light can still pass through this thin layer, same as with medical x-ray films, which may cause harm to the eye. Fortunately for digital cameras, you can use the LCD screen for viewing and avoid eye exposure. On the other hand, if you are using a telescope, try acquiring a product particular for solar observing.
2) Cardboard – I found used cardboard at home. A great way to recycle.
3) Glue, Electrical and Clear Tape
4) Cutters and Scissors
5) Plastic Ruler
Step 2: Measure the diameter of the lens you need to cover with your modified solar filter.
Fortunately, my camera’s lens is not that big so I could go on using a CD instead of an x-ray film. After measuring, if you have decided to use Compact Disc for this DIY solar filter, you need to carefully peel half of the polycarbonate plastic and retain the reflective side of the CD.