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IMPORTANT

: It is essential that corrector optics (field flattener or reducer/flattener) be

placed at a precise distance from the ccd sensor in your camera. The CCD sensor in

your camera is where the image is made. If the sensor is not the correct distance from

the flattener, the stars around the edge of the field will be distorted. The first thing you

need to know is the “backfocus” of the camera you will be using. The backfocus of the

camera is the distance from the attachment thread on the camera to its ccd chip. In most

DSLR cameras with the necessary t-ring added, this distance is 55mm.  

Your field flattener or reducer/flattener also has a

backfocus specification. Its backfocus is the dis-

tance from its rear of the flattener or reducer/flat-

tener to where the field is precisely flat. It is

important that the backfocus of your camera matches the backfocuser of

the flattener or reducer/flattener. 

On ccd cameras this distance varies widely so you may need to add

spacer rings and/or extension tubes. Also, it may be necessary to adjust-

pacing by a millimeter or two to obtain optimal results. 

15

With Single Lens Reflex Cameras (DSLR’s) remove the

lens and replace it with a t-ring that has the same size

thread as the flattener. The backfocus must include the

thickness of the t-ring that is attached to the camera in

place of the camera’s lens. When you add a t-ring to your

Canon or Nikon DSLR, this distance from the thread on

the t-ring to the ccd chip in the camera is about 55mm.

Our flatteners may be ordered with a “55 mm backfocus.”

Use one of these if you are shooting with a DSLR. 

Attaching your DSLR camera to the telescope is easy. 

Focuser           Flattener or               T-ring                

Reducer/Flattener                                     DSLR

With other ccd cameras, the backfocus distances vary.

Check with the maker of the camera to determine the

backfocus of your camera. If the distance is less than

55 mm you will need to add extension tubes and/or

spacer rings to make up the difference. For example, if

your camera has a 35 mm backfocus you will need 20

mm of extension tubes to get the flattener 55 mm from 

the ccd chip in the camera. 

Stellarvue produces a variety of spacer rings and 

extension tubes. Visit our astro-photography accessory

page on the web at: 

http://www.stellarvue.com/astro-photography/

Focuser           Flattener or                  Extensions        

Reducer/Flattener                                    CCD Camera

STEP 3: Unthread the 

2” adapter from the 

focuser drawtube 

STEP 4: Thread the 

flattener to the drawtube &

camera to flattener. 

STEP 1: Remove the

camera lens 

STEP 2: Install an 

oversized (48 mm) t-ring

Содержание SVX80T-25SV APO TRIPLET

Страница 1: ...n Precision Optics WWW STELLARVUE COM 11802 KEMPER ROAD AUBURN CA 95603 U S A PHONE 530 823 7796 FAX 530 823 8121 STELLARVUE STELLARVUEC SEEING IS BELIEVING The mission of Stellarvue is to inspire a h...

Страница 2: ...e to the mount 5 Setting up for visual use 6 Eyepieces and seeing conditions 7 Observing tips 8 Accessories chart 9 Reflex sights 11 Optical finder scopes 12 Solar viewing 13 Astrophotography 14 Photo...

Страница 3: ...trive to maintain a very high stan dard of customer service Stellarvue telescopes are individually made and each optic is tested multiple times to ensure perfection Please store and use it as you woul...

Страница 4: ...ch higher optical standard These lenses are extensively tested and approved for sale only if they reach our high optical standard Mechanical quality is of extreme importance in making a world class in...

Страница 5: ...knife Carefully remove the tele scope from the cardboard box and set it on a secure surface Unzip or unlatch the case to reveal the telescope inside Unpack the telescope from its case and make sure y...

Страница 6: ...4 wide Mounts using this size rail include the Stellarvue mounts with our TDLV shoes Para mount Losmandy Mathis Ten Micron Discmounts and larger Celestron mounts Smaller mounts use the Vixen style mo...

Страница 7: ...t night SETTING UP FOR VISUAL USE Now that you have securely attached the telescope to the mount you will need to balance it in both axes The mount manual explains how to do this If you are using an e...

Страница 8: ...24 times larger Notice that the smaller the focal length of the eyepiece the higher the power becomes So our 4 7 mm eyepiece provides 102 power 480 4 7 The ability of a telescope to magnify is limited...

Страница 9: ...your telescope to exhibit false color That color is not in the telescope but above you Moisture in the atmosphere may act like prisms and brighter objects will appear with a reddish color on one side...

Страница 10: ...uark Solar Filter with UVIR Energy Reduction Filter IMAGING ACCESSORIES 1 25 Eyepieces Optional 1 25 Filter DSLR Camera T ring Extension tubes required for your CCD camera call Stellarvue for assistan...

Страница 11: ...ck System Telescope mounts using the Losmandy sized rail NEEDED MOUNTING HARDWARE Optional Full Aperture Solar Filter Standard Thickly Padded Travel Case Included 10 Telescope mounts using Vixen sized...

Страница 12: ...is pointed For more information on this finder visit http www stellarvue com red dot finder The F001 red dot finder uses the standard BB gun mount We offer a number of bases that allow you to attach...

Страница 13: ...model of telescope Our 50 mm and 60 mm finders use R50 rings Our 80 mm finder will require the larger R80 rings Below are various ring systems made for our optical finders To mount these finders to th...

Страница 14: ...as they show extremely fine detail in sunspots and faculae on our nearest star 3 Daystar Chromosphere and Ha filters Observe prominences and surface Chromosphere details using a simple plug in device...

Страница 15: ...with our field flattener and camera Left The SFF3 field flattener will convert your telescope into a super 480 mm telephoto lens The optical system shown to the left includes 1 Your DSLR camera with...

Страница 16: ...and replace it with a t ring that has the same size thread as the flattener The backfocus must include the thickness of the t ring that is attached to the camera in place of the camera s lens When you...

Страница 17: ...ts over the past 20 years Guide Scope or Guider It is necessary to guide the mount and correct for atmosphic effects and mount inaccuracies A guide scope or off axis guider is connected to a laptop co...

Страница 18: ...set screw in the knob with play This will fix the problem If the focus knobs make a noise when they are turned they may be rubbing on one another or against the side housing To eliminate this loosen t...

Страница 19: ...lowing with the syringe Dust particles can be hard and scratch glass So every bit of dust should be removed before you use a lens cloth Once the lens is clear of any particles use Stellarvue lens clea...

Страница 20: ...ONGER SV SHALL NOTIFY THE CUSTOMER SV MAY REPLACE ANY PRODUCT THAT HAS BEEN DISCONTINUED WITH A NEW PRODUCT OF COMPARABLE VALUE AND FUNC TION PRODUCTS THAT HAVE BEEN DAMAGED DROPPED DISASSEMBLED ABUSE...

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