Is there a way to attach it to canon dslr for astrophotography ?

For casual astrophotography, you can purchase a smartphone adapter clamp that attaches to the eyepiece and centers the smartphone camera lens on the image projected by the eyepiece. Set your phone to snap a picture on voice command (most of them let you do this.) You can try letting the phone snap a picture automatically, or set your phone's camera to manual focus, and set the ISO and desired time exposure(s) for the image. Make sure you don't have any stray light or lay a black cloth over the assembly. It works surprisingly well.

Dear customer , Thanks for your contact. No, it is not Parfocal.SV118 Telescope Eyepiece Set is Parfocal.ASIN is B07TLKBPNJ. For accessories;we provide 2 months warranty;within 2 months;you can return for refund or replacement.If you have any other questions about warranty;please contact us freely;we will work with you win to win. If my reply still doesn't answer your question well or you want to know more details about this product,could you please contact us by message on Amazon? Because the customer's message can be seen in the first time on Amazon, and will solve the problem as soon as possible. Once I receive your response, I will try my best to answer your questions. Sincerely look forward to your reply. Best wishes ! Kelly

Is it works with a celestron se 8 telescope ?

Dear customer , Thanks for your contact. Yes, SV135 Telescope Eyepiece can fit telescope with 1.25inch barrel. For accessories;we provide 2 months warranty;within 2 months;you can return for refund or replacement.If you have any other questions about warranty;please contact us freely;we will work with you win to win. If my reply still doesn't answer your question well or you want to know more details about this product,could you please contact us by message on Amazon? Because the customer's message can be seen in the first time on Amazon, and will solve the problem as soon as possible. Once I receive your response, I will try my best to answer your questions. Sincerely look forward to your reply. Best wishes ! Kelly

Would this be good to use with an 8" dobsonian? i see its only 1.25in not 2

Dear customer , Thanks for your contact. Yes,SV135 Telescope Eyepiece is 1.25in . For accessories;we provide 2 months warranty;within 2 months;you can return for refund or replacement.If you have any other questions about warranty;please contact us freely;we will work with you win to win. If my reply still doesn't answer your question well or you want to know more details about this product,could you please contact us by message on Amazon? Because the customer's message can be seen in the first time on Amazon, and will solve the problem as soon as possible. Once I receive your response, I will try my best to answer your questions. Sincerely look forward to your reply. Best wishes ! Kelly

ASIN	B07Z64NK65
Best Sellers Rank	#196,690 in Electronics ( See Top 100 in Electronics ) #31 in Telescope Eyepieces
Brand	SVBONY
Brand Name	SVBONY
Coating	Fully Multi-Coated
Compatible Devices	Telescope
Country of Origin	USA
Customer Reviews	4.6 out of 5 stars 867 Reviews
Exit Pupil Diameter	3 Millimeters
Eye Piece Lens Description	Premium 6-Element 4-Group
Field Of View	57 Degrees
Finderscope	Reflex
Focal Length Description	21 millimeters
Focus Type	Manual Focus
Item Weight	230 Grams
Manufacturer	SVBONY
Model Name	SV135
Mount	Fixed Mount
Objective Lens Diameter	21 Millimeters
Optical Tube Length	1.25 Inches
Optical-Tube Length	1.25 Inches
Telescope Mount Description	Fixed Mount
Zoom Ratio	3

SVBONY SV135 Telescope Eyepiece 7 to 21mm 1.25 Inch Zoom Fully Multi Coated 6 Element 4 Group Lens Accessory for Astronomic Telescopes

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