1/. To explain what each model number is, They all start with KR which course are my initials.

2/. The numbers after that, 30 (60mm in length), 60 (70mm in length), and 90 (113.5mm in length), are the different length Olympus lenses. There are many other lenses from other manufacturers that are a similar length. You will need to measure yours from the body mount to the end of the lens. If you are not sure, message me please.

3/. The designation ‘O’ stands for Olympus flashes, mainly the FL-LM3 flash.

4/. The designation ‘G’ stands for the Godox V-350 and TT-350 flash units, and similar sized flash units.

5/. The designation ‘V’ stands for the Viltrox Spark Z-3 flash unit.

6/. The designation ‘GV’ stands for the Godox V-480 flash unit and similar sized flash units.

7/. The designation GX stands for the Godox V-860III flash unit, and similar sized flash units.

8/. The designation ‘TF’ stands for the Oly STF-8 twin flash.

9/. The designation ‘iT’ stands for the Godox iT32 flash unit.

10/. The only KR Macro diffusers without a code are the KR-30 & KR-60 and they are designed for the 30mm & 60mm lenses and the Meike MK-320 flash. They were the originals that started this all off.

To make it simple, if you have a Godox V480 flash, an Oly 60mm macro lens, then the KR Macro Diffuser you need is the KR-60GV.