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Large folding "Linen Tester" Magnifier, lens size 1.75X75

Large folding

Ref: Jan-FD75


Including VAT
QuantityPrice per item
4 or fewer items 4.50
5 to 9 items 4.26
10 or more items 3.84



1.5X70/3.5X20 Medium linen magnifier; black plastic Base has measurements in both inches and mm (to 2'' or 55mm).

Limited quantity (see above for the quantity in stock) - once these are gone, there are no more.

Read all about magnification and how to choose a magnifier, click here.

We have a calculator that shows you the working distance for any magnification, or the magnification for any working distance (Excel format), click here.

This is a very low value item. We have a minimum order charge of 7.50 (6.25 + VAT). Is this the only item you require? You may wish to buy more than one, or add some other items to the order.

Type: folding (linen tester)

Magnification / lens size in mm: 1.5X70

Lens material: plastic

Lens type: One large lens with a smaller 'spot lens'


- top (the bit with the lens) - 80mm X 80mm
- lens (the circle in the top that is the actual lens) - 67mm dia.
- height (from lens to object) - 111mm
- base (the bit that rests on the object): - 81mm X 80mm
- folded 28mm high; 80mm wide; 110mm deep

Graduations around the base 55m/1m and also 2in/ 1/16in

Type: Folding (linen tester)

Origin / brand: China

Casing: plastic

Finish: matt black

Presentation / extras: cardboard box


A linen tester (also known as a linen prover) is a folding magnifier, traditionally used for measuring the threads-per-inch on linen, which is why it has a scale marked around the base. Today, they are mostly used for viewing stamps, coins, prints and photos - anything flat. They come in all sizes from 15mm to 90mm, one even has a light.

Specifically, this one is large enough to rest over photos, postcards, prints etc, to study details in the picture, it's not too powerful (which would show you the dots that make up the picture).

{Further info.}

Everything you need to know about magnifiers and magnification.

See information about (and reviews of) loupes (small high-power folding jewellers' magnifiers).

See information about (and reviews of) binocular (head-worn) magnifiers- especially the surgeons-type.

See a guide to magnifiers for the partially-sighted.

See loupes with UV lights.

Video (electronic) magnifiers, video magnifiers compared.

Products: see pocket microscopes and phone microscopes, click here.

With most magnifiers* magnification and working distance are related. Download our Excel sheet, enter a magnification to see the resulting working distance, enter a working distance to see the resulting magnification.
* excluding surgeons-type, digital & phone magnifiers, and microscopes.

{Bulk Discounts}

Our returns policy (return any item you don't like, within 14 days) still applies, but if you return just some of a bulk order, and what you keep doesn't entitle you to the bulk discount, we will allow for this when issuing the refund / alternative items. Confused? - then please email first!

When returning bulk-discount items, if you request alternative items, postage is chargeable.