Agena 50mm Finder / Mini Guide Scope with Helical Focuser for CCD Autoguiding
Agena's compact 50mm StarGuider II Mini Guide Scope with Helical Focuser package will be just the ticket for your long exposure astrophotography autoguiding needs. It is an excellent accessory for telescopes with a focal length of up to 1500mm, and is perfectly suited for use with small-chip CCD autoguiders. Its light weight adds very little to your autoguiding setup thus putting less strain on your mount's tracking mechanism, allowing for smoother guiding. A guidescope is a must for accurate astrophotography exposures even with high precision mounts. And the price of this accessory will add little strain to your astrophotography budget. The StarGuider II features a 50mm fully-multicoated achromatic doublet objective. Its 162mm (f/3.2) short focal length design provides a bright, wide field which aids in the location of suitable guide stars. All internal surfaces of the tube are painted a flat black to improve contrast. The helical focuser on the StarGuider II retains a fixed orientation so that your CCD autoguider will not rotate during focus adjustments. The focuser moves the autoguider in or out while maintaining its orientation relative to the light path. This ensures that the guide star field stays fixed while focus adjustments are made. The helical focuser has a 12.5mm travel range and is designed to produce zero backlash. This eliminates flexure while focusing. The helical focuser ring is ribbed to improve grip and a thumbscrew locks the focuser in place once best focus is achieved. In addition to an optical tube with a helical focuser, this package includes an adjustable finder bracket, a universal dovetail mounting base, as well as an adapter plate to allow you to easily mount this guide scope on a variety of telescopes in various configurations. The bracket should also fit directly into the Synta/Vixen style finder bases already found on many telescopes, without the need for the included mounting plate/base (although these are also provided should the need arise). However, please note that although this base has a standard Vixen/Synta style design, there is no standard defined size for this design. As a result, it is possible that this bracket may not fit into other bases and some filing/adaptation may be required. The 1.25" autoguider receptacle features three locking thumbscrews for a secure fit. Simply insert the 1.25" nosepiece of your CCD camera and tighten. Couple this package with a main scope and a 1.25" autoguider CCD, and you will be ready to experience a new level of accuracy that autoguiding brings to long exposure astrophotography - without the bulk and expense of a larger dedicated guide scopes that were formerly required. The camera-end of the 1.25" eyepiece holder also features a short male T / T2 thread (M42x0.75) on the outside. Focusing is achieved by turning the helical focuser ring at the rear of the scope. The CCD will not rotate during focus adjustments. Using the included parfocal ring on the autoguider or CCD camera nosepiece provides some more focusing flexibility, and it also allows you to repeat the autoguiding setup between different imaging sessions. Specifications: What’s Included and What's Not: Note: Occasionally, the product you receive might have a slightly different cosmetic appearance or labeling than what is shown. This can often change from batch to batch according to the whims of the manufacturer. However, you will always receive a brand new, original product as described above. Description copyright: Agena AstroProducts - Reproduction without permission prohibited. Payment: We only accept Paypal and major credit cards through Paypal. Shipping Method: United States Postal Service (USPS), unless otherwise specified. Checkout: Please pay for the item(s) within 3 days from your account on eBay or by using the link in the email you receive from eBay. Shipping Discount: We offer shipping discounts if you order multiple quantities/items. eBay will automatically show you the correct, discounted shipping costs when you check-out. Combining Purchases: You can combine shipping for items purchased from us on eBay within 3 days. Buy the items individually, and check out together for all items. eBay will combine the shipping weights and show you the discounted shipping cost. You must check out for all items together via eBay for this. We cannot combine shipping costs after you check out individually for your purchases. Sales Tax: 8.5% sales tax added if your Ship-To address is in California. Delivery Time: Most orders ship within 1 business day of receiving payment. First Class shipments will take 3-5 days to arrive after we ship it. Priority Mail shipments will take 2-3 days. However, these delivery times are NOT guaranteed by the USPS. Delays of up to 2 weeks can occur in about 5% of the shipments. Tracking/Delivery Confirmation: eBay will update you once your order ships. You can see the order status or tracking information from your eBay account at any time. Shipping Cost: Click on the "Shipping and Payments" tab above and select your country to see your shipping choices and cost. If you need a shipping cost estimate for multiple items, please contact us. Delivery Time: 1) USPS First Class International: Delivery takes about 3-4 weeks after we ship your package. This can frequently take 4-6 weeks or more for several countries (8 weeks for Italy, Argentina, and South Africa; 8-12 weeks for Brazil). THERE IS NO TRACKING FOR FIRST CLASS SHIPMENTS. 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