How to Attach and Focus a Canon EOS DSLR (APS-C) to the Explore Scientifc David H. Levy Comet Hunter

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hey guys this is Simon in today's video

I'm going to show you how to attach a

DSLR camera to the Explorer scientific

common hunter and how I get it to focus

so had a lot of questions on how I

specifically do this so I'm gonna show

you it's not very hard okay so the first

thing you're gonna need is a tea ring

for the model of camera you intend on

using so this is a Canon SL one and I'm

gonna just be using a Canon tiering for

it the T adapter I use is the Orion

2-inch 0 profile T adapter that's

because the comet hunter doesn't have a

lot of room when you're trying to focus

a camera and so the smaller your T

adapter is in length the easier it will

be to focus the camera alright now that

we have the Orion 2 and 0 profile

T adapter and the T ring for Canon

cameras we're just going to thread these

together alright alright so I have my

astro modified Canon SL 1 here with my

astronomic pro plan at 7:42 infrared

filter that I'll be using tonight and

I'm just going to take my T ring and

clip it into the bayonet here until it


let's get that aligned ray and there we

go and we're just about ready so a lot

of people say they can't focus their

DSLR on the comet hunter because there's

not enough inward travel on the focuser

and actually found that you don't want

to go too far in you actually need an

extension tube to achieve focus and so

explore scientific includes this short

extension tube and I found that this is

just the ticket for getting an aps-c

sensor DSLR to focus on the common

hunter so we're gonna go ahead and

attach this and then attach the DSLR

alright so we're gonna go ahead and

unscrew this here


and then we're gonna attach our short

extension tube not the long one the

short one so now that that's on there

we're gonna go ahead and put our thumb

screw ring back on and then I just like

to make sure this is all as tight as

possible and I'm imaging for sure so

we'll get that on there nice and tight

alright so now that the short extension

tube is installed I'm gonna go ahead and

insert my DSLR into the two-inch focuser

so I'm gonna remove the dust cover here

and this is really where the beauty of

the orion two-inch zero profile t

adapter comes into play

it takes up virtually no space in the

focus or whatsoever

so I'll put that in we're gonna tighten

things down here and then just to prove

to you that I can focus this aps-c size

sensor in the comment hunter I'm gonna

be doing a live view of the moon on this

camera and what I found is this method

doesn't achieve focus at the end of the

draw tube or while the draw tube is

completely extended I found that it's

right in the middle which is just about

perfect because you need that that you

need that extra room to focus on deep

sky objects so I hope you like my method

of attaching a camera to the comet

hunter and let's go do a live view of

the moon all right so we're on the moon

here and I'm gonna adjust here get it

into focus


perfect right about there

a little bit more

there's an infrared shot of the moon and

then I will show you where the focus

position is okay so you can see the moon

here in my live view at the top of the

screen and my focus are with the short

extension tube is right at about the

zero point seven mark so I can lock that

down and maintain my focus and just to

show that this can be done with multiple

cameras this is a Canon t3i and man is

the moonlit crisp in the common hunter

all right well that is my method for

attaching and focusing a DSLR camera

with an aps-c size sensor on the

Explorer scientific David H levy common

hunter the comment hunter is an

excellent choice for astrophotography as

it utilizes the Richfield max utad

Newtonian design so if you're a beginner

that's just starting out or even if you

are an experienced astrophotographer I

hope my method of attaching the DSLR

works for you without any hassle and

that you can start producing some

quality images right away so thanks so

much for watching and have a great one