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DIY 33mm 6-Element Eyepiece



Modified Szentmártoni 2-2-2 Formula
- AFOV ~43 degrees
- Eye Relief ~16.5mm

Ingredients :
- two 25mm doublets with focal lengths of 100mm scavenged from a pair of 10x25mm compact binoculars
- one 21mm doublet with focal length of 80mm scavenged from a pair of 8x21mm compact binoculars
- plastic objective retention ring from the 10x25mm binoculars as the spacer of the two 25mm doublets (field group)
- plastic part from the eyepiece of an old 10x50mm binoculars as the eyepiece top that holds the 21mm doublet (eye lens)
- 1" copper pipe coupler as eyepiece outer barrel
- metal ring from the StarPointer of a Celestron Astromaster 70AZ (intended to be the field stop, not used)
- rubber eyecup from another eyepiece (not used)
- rubber eyecup from an old pair of 10x50mm binoculars
- chalkboard stickers to make the inner barrel of the eyepiece and for fitting elements with different diameters
- E6000 crafting glue 
- black marker pen for darkening the edges of the doublets

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Photo Information for DIY 33mm 6-Element Eyepiece

Taken with samsung SM-G930W8

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