GSO Base Plate for 2" GSO Reflector Focusers - 303mm Curve (For 12" Telescopes)
Ships by Next Business Day
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.
Overview:
- GSO 303mm base plate # FF434 for use with GSO 2" reflector focusers only. Not for use with GSO's 1.25" or 3" focusers.
- Will fit GSO-made 2" reflector focusers sold under other brands like TPO, Apertura, TS, Zhumell, some Orion, some Meade, etc. Should also fit 12" Celestron Star Hopper and Meade Lightbridge (but not Meade Lightbridge Plus) telescopes. May fit some model years of Orion XT 12" dobsonians (but not most). Do not assume that your focuser is made by GSO. If you are not sure about this, email us with a photo of your focuser and we can advise you.
- Not for use with reflector focusers from any other brand (such as Celestron, Sky-Watcher, Long Perng, Astro-Tech, Kuming United Optics, most Orion, most Meade, etc.).
- Designed to fit telescope tubes with an outside diameter of about 12", just smaller than that of many 12" aperture telescopes.
- If your tube OD (outside diameter) is a little less than 303mm, there will be a small, inconsequential gap between the underside of the base plate and your telescope tube surface. You can plug this gap with foam if you want to.
- If your tube OD is slightly larger than 303mm, you will need to add shims between the base plate's mounting holes and the tube surface and/or carefully align the focuser orientation to make it perpendicular to the telescope's optical axis.
- No mounting screws are included. You may be able to use the ones already on your scope or may need to purchase other ones locally.
- Includes allen key to attach this base plate to your GSO focuser.
- We cannot advise you if this base plate is the right fit for your telescope or focuser as these specifications are not standardized in the astronomy industry. Hence, please do not purchase this item without carefully comparing its specifications to that of your telescope tube.
Key Specifications:
Please detailed the schematic diagram above for more information.
- Base plate curve diameter: 11.93" (303mm)
- Base plate dimensions: 3.54" x 3.54" (90mm x 90mm)
- Hole Spacing (center-to-center along telescope tube/optical axis): 70mm (2.76")
- Hole Spacing (center-to-center perpendicular to telescope tube; straight line measurement): 73mm (2.87")
- Hole Spacing (center-to-center perpendicular to telescope tube; measured along curve of base plate): 74mm (2.91")
- Inside diameter of central hole: 3.07" (78.0mm)
- Mounting hole specification: Unthreaded inside diameter of 4.9mm
| Free Shipping Graphic | Free US Shipping |
|---|---|
| Hide Found a better Shipped Price on Frontend? | No |
Overview:
- GSO 303mm base plate # FF434 for use with GSO 2" reflector focusers only. Not for use with GSO's 1.25" or 3" focusers.
- Will fit GSO-made 2" reflector focusers sold under other brands like TPO, Apertura, TS, Zhumell, some Orion, some Meade, etc. Should also fit 12" Celestron Star Hopper and Meade Lightbridge (but not Meade Lightbridge Plus) telescopes. May fit some model years of Orion XT 12" dobsonians (but not most). Do not assume that your focuser is made by GSO. If you are not sure about this, email us with a photo of your focuser and we can advise you.
- Not for use with reflector focusers from any other brand (such as Celestron, Sky-Watcher, Long Perng, Astro-Tech, Kuming United Optics, most Orion, most Meade, etc.).
- Designed to fit telescope tubes with an outside diameter of about 12", just smaller than that of many 12" aperture telescopes.
- If your tube OD (outside diameter) is a little less than 303mm, there will be a small, inconsequential gap between the underside of the base plate and your telescope tube surface. You can plug this gap with foam if you want to.
- If your tube OD is slightly larger than 303mm, you will need to add shims between the base plate's mounting holes and the tube surface and/or carefully align the focuser orientation to make it perpendicular to the telescope's optical axis.
- No mounting screws are included. You may be able to use the ones already on your scope or may need to purchase other ones locally.
- Includes allen key to attach this base plate to your GSO focuser.
- We cannot advise you if this base plate is the right fit for your telescope or focuser as these specifications are not standardized in the astronomy industry. Hence, please do not purchase this item without carefully comparing its specifications to that of your telescope tube.
Key Specifications:
Please detailed the schematic diagram above for more information.
- Base plate curve diameter: 11.93" (303mm)
- Base plate dimensions: 3.54" x 3.54" (90mm x 90mm)
- Hole Spacing (center-to-center along telescope tube/optical axis): 70mm (2.76")
- Hole Spacing (center-to-center perpendicular to telescope tube; straight line measurement): 73mm (2.87")
- Hole Spacing (center-to-center perpendicular to telescope tube; measured along curve of base plate): 74mm (2.91")
- Inside diameter of central hole: 3.07" (78.0mm)
- Mounting hole specification: Unthreaded inside diameter of 4.9mm
| Free Shipping Graphic | Free US Shipping |
|---|---|
| Hide Found a better Shipped Price on Frontend? | No |
GSO Base Plate for 2" GSO Reflector Focusers - 303mm Curve (For 12" Telescopes) # FF434