Details
Achieving critical focus across a flat imaging field requires precise control of back-focus distance and that often comes down to fractions of a millimetre. This M48 11-piece stainless steel shim set gives you the fine adjustment you need to dial in your spacing exactly.
Each set includes shims in 11 thicknesses (0.02mm, 0.05mm, 0.1mm, 0.15mm, 0.2mm, 0.3mm, 0.4mm, 0.5mm, 0.6mm, 0.8mm, and 1.0mm), which can be used individually or stacked in combination to achieve virtually any spacing increment. Made from durable 304 stainless steel, the shims provide a stable, secure connection between your imaging train components without introducing flex or compression over time.
Whether you're correcting the back-focus distance for a field flattener, coma corrector, or filter wheel setup, these shims let you make precise adjustments without swapping out spacer rings.
A simple solution to one of astrophotography's most common spacing headaches.
Use with M48 spacer rings or spacer ring sets.
Additional Information
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