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Magnification Options

Compact 2.5x
(EVX 250)

Compact 2.5x Ergo
(EVC 250)

Compact 3.0x
(EVC 300)

Compact Prism 3.5x
(EVK 350)

Compact Prism 4.5x
(EVK 450)

Mounting Options

Through The Lens

Front Lens Mounted


Product Specifications

Standard Field / Galilean

PowerNameModelWorking Dist. RangeDepth-of-FieldField SizeMounting
2.5xCompact 250EVX 250Custom 10-35" (25-87cm)8-20" (20-50cm)3.5-11.1" (9-27cm)TTL/FLM
2.5xCompact 250 ErgoEVC 250Custom 10-30" (25-75cm)5-15" (13-38cm)3.0-7.0" (8-18cm)TTL/FLM
3.0xCompact 300EVC 300Custom 10-26" (25-65cm)4-9" (10-23 cm)2.2-3.9" (5-10cm)TTL/FLM

Expanded Field / Prism

PowerNameModelWorking Dist. RangeDepth-of-FieldField SizeMounting
3.5xCompact Prism 350EVK 350Custom, 10-30" (25-76cm)2-8" (5-21cm)3.1-5.9" (8-15cm)TTL/FLM
4.5xCompact Prism 450EVK 450Custom, 10-30" (25-76cm)1-6" (3-15cm)2.7-5.0" (7-13cm)TTL/FLM

Specification Notes

Depth-of-field (DoF) – achievable DoF
will vary according to:

Eye accommodation capability

Working distance; longer working distance = longer DoF

Field Size (FS) – achievable FS
will vary according to:

How close the ocular is to the eye

Working Distance; longer working distance = more FS


If you use any kind of prescriptive or corrective lenses (distance, reading, “drugstore readers”), you must submit your prescription to SurgiTel for you to see through your loupe correctly.

Prescriptions may only be upgraded by SurgiTel or your local optometrist.