KPA-302 K9 Plano concave lens, Optical lens, Flat concave lens, dia:12.7mm, f:-19.0mm

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Amazon.com Price: $28.50 (as of 12/27/2020 20:46 PST- Details)

Description

Lenses are coated products, please confirm the product’s parameters before buying. If there is no product quality issues, the sale is not refundable, please understand~
Material: K9
Diameter: 12.7mm
Deviation of Diameter: +0.0/-0.20
Aperture: >90%
Focal length(f’): -19.0mm
Deviation of focal length(Df): ±2%
Back focal length(fb): -20.3
Thickness of center(Tc): 2.0
Deviation of Thickness of center(DTc): ±0.1
Thickness of edge(Te): 4.3
Deviation of center: 3′
Diaphragm: 1~5
Local diaphragm: 0.2~0.5
Clearing: IV stand
Coating: MgF2  antireflection  film
Weight: 1.0

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