William Optics 1.25" 90-deg Erecting Prism Diagonal for RedCat 51 only (Red)
Availability: Item has been discontinued by the manufacturer
Contiguous US Customers:
All items we sell ship for free within the Contiguous US. Shipping will be via the cheapest shipping method which will vary depending on the items in your order. During checkout, you may also be shown other optional faster shipping choices.
US Customers in Hawaii and Alaska:
Free shipping applies to almost all products. A few large telescopes and mounts are excluded from this free shipping offer. For these items, please contact us to obtain a shipping quote before you check out using the online shopping cart.
International Customers:
Free shipping does not apply to international orders. During check-out, you will be presented with several shipping choices and costs. However, the export of some items may be restricted outside the US due to size or manufacturer restrictions.
William Optics 1.25" RedCat Erecting Prism Diagonal (For RedCat 51 Telescopes Only)
This high-quality William Optics erecting prism diagonal provides a "correct" image when observing with the William Optics RedCat 51 telescope. When observing with this diagonal, "up is up" and "left is left" which makes it the perfect accessory for terrestrial daytime observing. The precisely engineered diagonal prism is made from anti-reflection coated BAK4 glass for maximum image quality and light transmission. It also includes a matte blackened interior to reduce internal stray light reflection and maximize contrast. Its 1.25" barrel accomodates any 1.25" eyepiece. The diagonal is made from CNC-machined 6061T aluminum and incorporates a red aluminum anodized plate.
Attaching the Diagonal to a William Optics RedCat Telescope
The RedCat telescope has very limited backfocus and cannot accept regular 1.25" diagonals, even if attached to the telescope's terminal M48 male thread via a suitable thread-converting adapter. This special RedCat diagonal has a male M56x0.75 thread on the telescope side. In order to attach the RedCat diagonal to the telescope, you must first remove the telescope's rear adapter to access the RedCat's M56 female thread.
Two important things to note:
1) You will require a 1.5mm Allen key/wrench to remove the tiny screws on the removable adapter on the scope. This is not included with the diagonal. Newer RedCat scopes include this Allen key (earlier shipments of the Redcat did not).
2) Once you remove the adapter to attach the RedCat diagonal, you will no longer have access to the internal M48 female threads to attach 2" threaded filters, which is not usually a problem for terrestrial viewing.
Manufacturer part number: D-EP90-125-RC51
| Product Banner Type | discontinued |
|---|---|
| Free Shipping Graphic | Free US Shipping |
| Hide Found a better Shipped Price on Frontend? | No |
William Optics 1.25" RedCat Erecting Prism Diagonal (For RedCat 51 Telescopes Only)
This high-quality William Optics erecting prism diagonal provides a "correct" image when observing with the William Optics RedCat 51 telescope. When observing with this diagonal, "up is up" and "left is left" which makes it the perfect accessory for terrestrial daytime observing. The precisely engineered diagonal prism is made from anti-reflection coated BAK4 glass for maximum image quality and light transmission. It also includes a matte blackened interior to reduce internal stray light reflection and maximize contrast. Its 1.25" barrel accomodates any 1.25" eyepiece. The diagonal is made from CNC-machined 6061T aluminum and incorporates a red aluminum anodized plate.
Attaching the Diagonal to a William Optics RedCat Telescope
The RedCat telescope has very limited backfocus and cannot accept regular 1.25" diagonals, even if attached to the telescope's terminal M48 male thread via a suitable thread-converting adapter. This special RedCat diagonal has a male M56x0.75 thread on the telescope side. In order to attach the RedCat diagonal to the telescope, you must first remove the telescope's rear adapter to access the RedCat's M56 female thread.
Two important things to note:
1) You will require a 1.5mm Allen key/wrench to remove the tiny screws on the removable adapter on the scope. This is not included with the diagonal. Newer RedCat scopes include this Allen key (earlier shipments of the Redcat did not).
2) Once you remove the adapter to attach the RedCat diagonal, you will no longer have access to the internal M48 female threads to attach 2" threaded filters, which is not usually a problem for terrestrial viewing.
Manufacturer part number: D-EP90-125-RC51
| Product Banner Type | discontinued |
|---|---|
| Free Shipping Graphic | Free US Shipping |
| Hide Found a better Shipped Price on Frontend? | No |