Westech Optical Corporation

Photographic Enlarging Lenses

Photographic Enlarging Lenses Specifications If you do not see the lens you need, or require a custom design, please fill out our specification form. We will respond within 24 hours. These photographic enlarging lenses offer a large angle of coverage, high limiting resolution and are optimized for finite conjugates. They are readily available at low cost and provide excellent optical quality. Each lens has an adjustable iris which offers greater flexibility when deciding the optimum aperture. Westech offers complete engineering assistance and samples may be sent for engineering evaluation. Westech offers a variety of precision optics and can design a lens for specific requirements.

Photographic Enlarging Lenses Specifications

Part No.	3 Element	Film Size	Full Angle (degrees)	Max Barrel Diameter	Barrel Length	Flange Focal Length	Back Focal Length
2137	50mm F/3.5	24 X 36	45	40.0	25.7	44.87	44.65
2139	75mm F/3.5	60 X 60	51	40.0	30.36	68.93	66.64
2141	75mm F/4.5	60 X 70	53	40.0	26.5	77.85	75.89
2143	50mm F/4.5	60 X 90	55	40.0	28.0	88.58	84.85
2145	135mm F/4.5	4 X 5	56	47.0	34.0	119.25	116.66
2147	150mm F/4.5	4 X 5	55	47.0	55.0	128.08	124.57
	4 Element
2151	50mm F/4.5	24 X 36	47	45.0	29.0	42.60	43.55
2153	75mm F/4.5	60 X 60	53	45.0	29.0	66.7	65.83
2155	90mm F/4.5	60 X 70	54	50.0	30.5	82.24	79.23
2157	105mm F/4.5	60 X 90	55	50.0	33.5	92.14	91.09
2159	135mm F/4.5	4 X 5	58	55.0	44.00	122.62	119.72
2161	150mm F/3.5	4 X 5	53	56.0	42.27	142.88	132.33

If you do not see the lens you need, or require a custom design,
please fill out our specification form. We will respond within 24 hours.

Don’t Pay Catalog Prices for OEM Optics

Engineering assistance is always available.
Call for technical assistance and fast quotes at
585-377-2490 or FAX us at 585-377-2543