7. M69 Extension Tubes and Spacer Rings

69 mm Extension Tube - 10 mm Length - SFE-M69-010

This is a 69 mm extension tube that adds 10 mm of length. The male thread is 6 mm long and the female thread is 8 mm deep. 

69 mm Extension Tube - 15 mm Length - SFE-M69-015

  This is a 69 mm extension tube that adds 15 mm of length. The male thread is 6 mm long and the female thread is 12 mm deep. 

69 mm Extension Tube - 21mm Length - SFE-M69-021

This is a 69 mm extension tube that adds 21 mm of length. The male thread is 4 mm long.

69 mm Extension Tube - 33 mm Length - SFE-M69-033

This is a 69 mm extension tube that adds 33 mm of length. The male thread is 4 mm long and the female thread is 20 mm deep. 

69 mm Extension Tube - 38 mm Length - SFE-M69-038

This is a 69 mm extension tube that adds 38 mm of length. The male thread is 4 mm long and the female thread is 20 mm deep.

69 mm Extension Tube - 40 mm Length - SFE-M69-040

This is a 69 mm extension tube that adds 40 mm of length. The male thread is 4 mm long and the female thread is 20 mm deep. 

69 mm Male to 48 mm Male Extension - 36.5 mm Length - SFE-M69M48-036.5

This is a 36.5 mm extension with 69 mm male to 48 mm male threads. The 69 mm male thread is 4 mm long and the 48 mm male thread is 5 mm long.    This particular item is made in China and it is an economical way to get an extension of 36...

69 mm Spacer Ring - 1 mm Thick - SFE-M69-001

This is a precision, CNC machined 69 mm ID spacer ring that is 1 mm thick. It provides 1 mm of additional space between the field flattener and the imaging camera. 

69 mm Spacer Ring - 2 mm Thick - SFE-M69-002

This is a precision, CNC machined 69 mm ID spacer ring that is 2 mm thick. It provides 2 mm of additional space between the field flattener and the imaging camera. 

M69 Extension Tube - 7 mm Length - SFE-M69-007

This is a 69 mm extension tube that adds 7 mm of length. The male thread is 5 mm long and the female thread is 5.4 mm deep.