TPO 90 Erect Image Diagonal - 1.25"

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TPO 90 Erect Image Diagonal - 1.25"

Tired of getting on your knees to use your refractor of catadioptric-style telescope? Then stop breaking your back or craning your neck... TPO is here to help!

The TPO 1.25 inch 90 degree Erect Image Diagonal accepts all 1.25 inch eyepieces and fits into focusers (either 1.25 inch in diameter or a 2 inch focuser with a 2 inch-to-1.25 inch adapter) that accept 1.25 inch barrels. It automatically places whatever eyepiece that's put into it at a 90 degree angle for more comfortable viewing! And what's more... The image remains correct. The view stays exactly the same as if you were looking at it unaided - right stays to the right and left stays to the left. No reversal of image!

TPO Product Number: D125EI90


Diagonal Size1.25"
Diagonal Type90 degrees Erect Image
Dust Caps IncludedYes
Free ShippingYes
Warranty2 Year Warranty
Customer Reviews
4.8 Based on 4 Reviews
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United States United States
TPO 90 ***** Image Diagonal

Excellent item. Views as good as regular diagonals. Price very reasonable, a bargain. Highly recommended.

United States
Good service and price matching.

I am well pleased with the item. Good quality!

Great for star hopping

While most correct-image diagonals are used for daytime terrestrial viewing, I wanted one to facilitate star hopping when using a typical star atlas. I have used this diagonal with 80mm and 102mm refractors that are also equipped with a RACI finder. This diagonal makes star hopping a breeze. Views are crisp and bright with no more chromatic aberration than a typical mirror diagonal. I would have given the diagonal a 5 star rating, but I'm waiting to see how durable it is (the housing is plastic rather than metal).

Aldo S. Kleiman
Using the 90º diagonal.

I've been using the OPT 90º ***** Image Diagonal it looks fine and works great this is a very good product.