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Peak #1990-4 4X & #1990-7 7X Anastigmatic Loupe

Peak #1990-4 4X & #1990-7 7X Anastigmatic Loupe

The 1990-4 Loupe with 4X magnifying power is specially designed to enable observers to simultaneously inspect the whole picture area of the standard micro-film size (i.e. 32mm x 45mm) or flat objects less than 58mm in diameter. The image observed through the loupe is critically sharp from the center to the edge of the image field, because of the careful optical correction of the loupe for the astigmatism and the curvature of the field as well as aberrations concerning the image of the central image. Ordinary magnifiers are corrected only for the central image. In this respect, this loupe is quite similar to anastigmatic photographic lenses, and is manufactured with the same care and precision.

One point which distinguishes this loupe from photo-lenses is that the position of the effective pupil of the loupe has been placed as far as 25mm above the upper pole of the loupe; so that an observer can inspect the whole image field by merely moving his eyeball, without moving his face. This is an extremely advantageous feature for a micro-filmer, because it enables him to inspect a number of negatives very speedily and comfortably.

The Peak 1990-7 Anastigmatic Loupe with 7X has taken over the optical system of Peak Anastigmatic Loupe 4X, improving the magnifying power as high as 7 times. You can use Anastigmatic Loupe 4X to check the whole picture area of film. In case only a part of the object is to be inspected with a higher magnifying power, Peak Anastigmatic Loupe 7X is the best for the job.

A cross hair reticle metric scale is provided.

1990-4X
Field of View: 58 mm
Effective aperture: 30 mm
Min scale division: 0.1 mm
Working distance: 54mm
Size: 73 x 77mm (Strap-clasp not included)
Net Weight: 272 gm

1990-7X
Field of View: 41 mm
Effective aperture: 22 mm
Min scale division: 0.1 mm
Working distance: 36mm
Size: 55 x 53 mm (Strap -clasp not included)
Net Weight: 103 gm

Replacement cross reticle and parts available, see below.

Quantity Discount:
5% off all orders that total $1,010.00 or more on items of the same model. (Accessories and Reticles not included)
For items that are priced over $1,010.00 two or more of the same item must be ordered to receive the discount.
DISCOUNT TABLE SHOWN AT BOTTOM OF PAGE

  • Models: OPT-P19904, OPT-P19904BC, OPT-P19904RET, OPT-P19907 & OPT-P19907RET

  • Manufactured by: Peak Optics

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Click For Quantity Discount Table 1990-4 Anastigmatic Loupe




1990-4 Replacement Parts





1990-4 Reticles




Click For Quantity Discount Table 1990-7 Anastigmatic Loupe




1990-7 Reticles




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