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SV503 Telescope Set for Prime Focus Photography - Connected to M42 Camera Ring

SV503 Telescope Set for Prime Focus Photography - Connected to M42 Camera Ring

SV503 prime focus photography, also known as direct focus photography, is a method of directly using the telescope to take pictures without adding any optical objects between the telescope and the camera. The main objects of prime focus photography are nebulae, clusters and galaxies.This can be achieved by matching the SV503 set with the M42 camera ring.

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Model	SV503-F9359A	SV503-F9359B	SV503-F9359D
Type	Refractor	Refractor	Refractor
ED Glass	S-FPL51	S-FPL51	S-FPL51
Coating	SMC	Ultra-wideband coating（SMC）	SMC
Aperture	70mm / 2.75-Inch	80mm	102mm / 4.01-Inch
Focal length	420mm	560 mm	714mm
Focal Ratio	f/6	F7	f/7
Type of Focuser	RAP (Rack and Pinion)	2 inch Dual speed focuser	RAP (Rack and Pinion)
Gear Reduction	1:10 Fine movement	1:10	1:10 Fine movement

Model	W2370A
Length	Along the 34mm
Width of internal slot	4.2mm
Horizontal length of internal slot	36.5mm
Vertical length of internal slot	36.5mm
Can be fixed	M3-M4 screw
Weight	41g
LWH	454025mm

Model	SV165
Aperture	30mm
Focal length	120mm
Focal Ratio	F4
Tube travel	45mm
Back Focus Length	26mm
Mount	UNC 1/4-20

Model	SV194-W1077A	SV195-W2054A
Size	M42*0.75	M42*0.75
Male thread	Nikon F-mount Male	Canon EF-Mount
Material	Metal Aluminum	Metal Aluminum
Net weight	31g / 1.05oz	44.7g

Model	SV196-W9153A	SV196-W9153B
Size	M42*0.75	M42*0.75
Male thread	Female---SONY A-mount Male	Female---Sony E-mount Male
Material	Metal Aluminum	Metal Aluminum
Net weight	35.7g / 1.26oz	68.3g / 2.4oz
Thickness	10mm	36.5mm

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