I am looking for a list of the best 2 or 3 loupes for viewing
registration targets on printed sheets.  (for press operators).  The
loupes should be under 100$ each, but they should make it very easy to
identify if the sheet is out of register via visual inspection with
the loupe.  Thanks.  Please also provide sources for purchase.

Hi jamiedolan,

Upon examining the two sites below, I learned that loupes of  10x-50x
power are used in registration inspection, and the higher the cost,
the better the lens/magnification. I have included various
magnifications and models (handheld, hands-free, frame mounted, etc.)
of loupes in my answer, and compiled a list of websites that sell
loupes, in ascending price order. I have not included loupes of 
magnification over 30x because the price exceeded your specifications,
focusing instead on 5x-22x.

You did say you wanted "2-3 of the best loupes", but I have included
more, as I was unsure of your desired style and magnification.

ScreenWeb
http://www.screenweb.com/prepress/cont/closelook1000.html
Lithco Inc.
http://www.lithcoinc.com/web2001/T701.htm
============================================================

From Indigo Instruments, a printer?s loupe, $7.50 USD
http://www.indigo.com/magnify/desktop-magnifiers.html

Northern Tools sells a 3-piece set of eye loupes, 2.5x, 5x and 10x for $4.99 USD 
http://www.northerntool.com/webapp/wcs/stores/servlet/ProductDisplay?catalogId=4006970&storeId=6970&langId=-1&productId=12793&storeId=6970&langId=%2D1

A dome style 8x focusable loupe from See Larger,  for $14.95 USD
http://www.seelarger.com/magnifiers/FocMagWc.htm

See Larger has a variety of loupes/magnifiers, seen here:
http://www.delpozzo.com/magnifiers.htm

This Linden Hill site sells two loupes, 5x-10x,  under $20.00 USD 
http://shop.store.yahoo.com/lindenhillsphoto/loupes.html


From Optics Planet, an 8x loupe, $20.00 USD
http://www.opticsplanet.net/ca8xlowifrup.html

From Precision Graphic Instruments, a 9X illuminated model, $25.00 USD
http://www.pgi-inc.net/212xgianilfo.html

No pictures yet, but a variety of loupes and magnifiers, up to 22x,
and $17.50 -  $98.00 USD
http://www.americanprintingequipment.com/printingmagnifiers.htm

From Bartlett & Co.,loupes up to 17x,  $32.95 USD
http://www.eyeloupes.com/Merchant2/merchant.mv?Screen=PROD&Store_Code=E&Product_Code=29.081&Category_Code=EL

Get Smart Products has a 22x loupe,  $35.95 USD, 
http://www.pfile.com/cgi/cart.cgi?db=loupes_lightboxes.db&search=Peak+22x+Loupe&method=phrase

From Peak, a head loupe, $44.00 - $53 USD, depending on magnification,
ranging from 2.2x ? 5.2x
http://www.peakoptics.com/product_info.php/products_id/100

Peak also has  several eye loupes, $25 - $38.50 USD, depending on
magnification, 3.3 ? 10x
http://www.peakoptics.com/product_info.php/products_id/124

Radio Shack has a 20x jeweler?s loupe, $29.99 USD 
http://www.radioshack.com/product.asp?catalog%5Fname=CTLG&product%5Fid=63-1304

Radio Shack?s other models:
http://www.radioshack.com/search.asp?find=magnifiers&SRC=1

From SPI supplies, a handheld loupe, $36.50 USD
http://www.2spi.com/catalog/magnifiers/spi-unique-loupes.shtml


Porter Camera Store, an 8x free standing, with  neck strap, $53.99 USD
http://porterscamerastore.com/Merchant2/merchant.mv?Screen=PROD&Product_Code=52-0146&Category_Code=M2D


Caprock Development, inspection loupes, from 10x-20x, from $55-$68 USD 
http://www.caprockdev.com/magnifie.htm

Wolfe?s has one loupe under $100, a 4x loupe for $79.00 USD
http://www.wolfes.com/cgi2/CatalogMgr.pl?cartID=a-4389&SearchField=partnumber&SearchFor=86829&template=Htx/shop.htx&ftr=back


These loupes looked interesting, though they are over your price
range. They are included for interest only, as they do not meet your
requirement.

From Eagle Optical, various models of frame mounted binocular loupes,
all over $100 USD
http://www.eagleoptical.com/press_release.htm

http://www.eagleoptical.com/press_release.htm

===============================================================
Kelleher Medical sells all styles of loupes, but lists no prices.
Should you see something of interests, call or e-mail them for
specifics. Contact information is on this page:
http://www.kellehermedical.com/kellehermedweb/optical1.htm
===============================================================

This site has interesting accessories for loupes, such as neck cords, and levers
http://www.medicalresources.com/shopping/catrprodgroup.asp?subcat=251


Hope this helps you find the loupe you need! If any part of my answer
is unclear, or if I have duplicated information you already had,
please request an answer clarification, and I will be happy to
respond!

Regards,
crabcakes-ga

Search strategy:
Printer's Loupes
Magnifiers
Registration loupes

Exactly what I needed to know.  Thank You!