Datyson 0.5X Reducer for Photography and Observing This reducer halves the focal length of your telescope, giving you a much wider field of view. You can use this, for example, for doing astrophotography by using an astronomy webcam.
Apply to :0.5x reducer for screwing into a 1.25'' filter thread(M28.6X0.6mm), more lens speed.
Using for :Increase the image field of your web camera, use the reducer visually with an eyepiece, also ideal for video astronomy.
Product Features
0.5x focal reducer cuts the telescopes focal length in 0.5 times of original's to get a wider field of view
Fully metal structure design;Fully anti-reflection coatings on all air-glass surfaces for increased contrast
The focal reducer is great for visual use for a bigger FOV and is indispensable when CCD imaging
Directly connect the interface to the eyepiece;there is a very good performance in both visual and photography
Mounting threads - 1.25" filter thread (M28.6x0.6mm) on both sides: Threads into eyepieces, camera adapters, and other accessories with standard 1.25" threads, and can be stacked with additional 1.25" threaded accessories.
Intended for use with with longer-focal-ratio telescopes and eyepieces of narrow to moderately-wide apparent fields of view.
Product parameters Brand: Datyson Product No.: 5P0087 Origin: China Focal Reducer: 0.5x Barrel Size: 1.25"/31.7mm Thread Interface: M28.6x0.6mm thread at both ends Sleeve Material: Full metal aluminum alloy Lens Coated: FMC-Green Lens Material: Pure optical lens Color: Black Net Weight: 16g