Step-Up Adapter M25.5-M30.5Step Up Rings by Midwest Optical Systems (MidOpt) Use larger diameter filters on lenses with smaller diameter filter threads Often mandatory for shorter focal length lenses in order to prevent vignetting Available sizes: SU22. 5 25. 5 SU77 105 Commonly referred to as a thread adapter Step Up Rings are most commonly used to adapt a larger diameter thread on items such as ring lights and filters to a smaller diameter thread (generally the thread on the

Male Thread M49 Female Thread M52 Manufacturer Midwest Optical Systems

13° Front Principle Point -30

The CK100-NA is the same as the CK100 with the exception that it does not include the Clean Air Duster

MidOpt EXT-20

Fujinon CF50HA-1 Series Lens Features:

FE185 Series Fisheye Lens

Filter categories included in the SK100: Bandpass

30 mm Rear Principle Point -17

HF35SA-1 suggested replacement is HF35XA-5M

Swivellink AFSB-SB-8

38 mm Rear Principle Point -7

Male Thread M52 Female Thread M48 Manufacturer Midwest Optical Systems