Intrepid MKIV reflex viewfinder

The problem I was trying to solve was to be able to invert the image from its upside down position (I shoot portraits, so I prefer it as such). This tool makes focusing on this 4x5 so much easier, especially in on-the-go scenarios or for street photography. No more need for a loop or focusing cloth!

PLEASE READ AND UNDERSTAND BEFORE PRINTING
1- This entire design is based on an intrepid MK4.
It uses the same measurements from the original Intrepid ground glass holder, making it a straight replacement. The main hood is made to be clipped onto the stock ground glass holder. You can also print another ground glass holder if you prefer not to use your stock one. You'll need to either procure new ground glass and fresnel lens or transplant the ones from the stock one.

2- Pertaining to the provided ground glass holder: the two side retainer pins will have to be placed by you based on your application - because there are differences between the cameras since they are custom made.

3- You will need to procure the optics which are a surface-first mirror and 50mm lens for the eye cup (see details below).

4- it is highly suggested to print this in PETG. While I have printed it in PLA before, some have experienced layer separation during assembling. Mine is fine because of my own print settings and for the simple fact that I baby my tools. You've been warned (lol)

PARTS NEEDED
Please note that some of these may change in availability

• Eisco lens for eye cup: Specifically EISCO Lens (https://a.co/d/05fmSzr8)

• First surface mirror - something like this: https://a.co/d/02OobUzR
  Or you can pick up a 4x5 mirror from a hobby shop

• M3 Heat set inserts

• M3 bolts