imaging with a meade lx200 10 and the canon digital rebel using dslrfocus 3 xx l.
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Imaging with a Meade LX200 10” and the Canon Digital Rebel Using DSLRFocus 3.xx. By: Jerry Hilburn – San Diego Astronomy Association – Astro Imaging Chair – http://aisig.sdaa.org. Gather the Parts. Camera Battery or Power Supply Canon USB/SIPP Cable & Connector

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imaging with a meade lx200 10 and the canon digital rebel using dslrfocus 3 xx
Imaging with a Meade LX200 10” and the Canon Digital RebelUsing DSLRFocus 3.xx

By: Jerry Hilburn – San Diego Astronomy Association – Astro Imaging Chair – http://aisig.sdaa.org

gather the parts
Gather the Parts
  • Camera Battery or Power Supply
  • Canon USB/SIPP Cable & Connector
  • Parallel DB-25/SIPP Connector – Bulb Mode Control
  • Canon Digital Rebel
  • Meade or Celestron 6.3 Focal Reducer
  • T-Ring Canon EOS 35 MM SLR Camera
  • Meade or Televue Basic Camera Adapter – 1.25 or 2 in.
  • Laptop – XP running DSLRFocus 3.xx
prepare the telescope
Prepare the Telescope
  • Set Tube and Forks to North / 90
  • Using the Auto Star Hand Controller
  • Perform One Star Alignment
  • Perform Polar Align & GPS Detect
  • Site Polaris – Adjust Wedge
  • Find Alignment star
  • Align Guide Scopes to Eye Piece Center
  • Perform Drift Alignment – Adjust Wedge
  • Perform PEC Update/Alignment
  • Set Micro Focuser to Center Position
prepare the camera
Prepare the Camera
  • Insure Camera is OFF
  • Insure Laptop is OFF
  • Connect T-Ring to Camera
  • Connect Eyepiece Adapter
  • Connect Battery / PS
  • Connect Bulb Cable
  • To Camera
  • To PC Parallel
  • Connect USB Adapter
  • To Camera
  • To PC USB
  • Connect Camera to Scope
focus setup detail
Focus Setup Detail
  • Unlock Mirror
  • Attach Eyepiece and Set Gross Focus on Target Focus Star
  • Remove Eyepiece
  • Attach Camera and Set Micro focuser to Center Point
slide6

Power On the Laptop - Start DSLR Focus

    • Turn on Camera – Set to Manual Mode
    • Cancel EOS Kiss Rebel 300D Device Connected Dialog
slide7

Port Setup

  • Find Ports – LPT
  • Enable Parallel
  • Test Port
  • Close Dialog
setup dslrfocus connection
Setup DSLRFocus Connection

Select Application – Connect to Camera

Acknowledge Camera Model Selection Dialog Box

slide11

Manually Gross Focus

  • Lock The Mirror
electronic focus analysis mode
Electronic Focus Analysis Mode

HFWHM (Horizontal Full Width Half Maximum)

VFWHM (Vertical Full Width Half Maximum)

A measure of the size of the image, it is defined as the width of the Gaussian fit at half the maximum value. Ideally both should be the same. If different it indicates a problem in collimation, or bad seeing conditions.

RSV (Radial Sum Value)

Radial sum value is a relative measure of star width. As the star gets smaller this number gets bigger.

Peak (Peak Value)

Peak Value is the measure of the brightest pixels in an image. A perfectly focused image will have a higher peak value than an out of focus image. Your goal is to obtain the highest peak value possible.

slide13

NEEDS FOCUS!

H&V=10.00

RSV=4.00

Peak=248

See DSLRFocus

Help File System

For Detail Info on

Focus Analysis

Mode

When using this

Mode be sure to

only use the micro

focuser to adjust

focus

slide14

BEST FOCUS!

H&V=6.00

RSV=3.16

Peak=254.5

mask focus technique
Mask Focus Technique
  • Add Mask - Continue Gross Focus
  • When you have a dot then Lock the Mirror
  • Zoom to 100% - Focus Till 3 Dots = 1 Dot
  • Change ISO 200 Time to 1 Second
  • Zoom in to 200% Focus until Dot is Best Circle
  • Use Micro Focuser to Adjust To Best Circular Dimension
slide18

Getting Closer – Change

Micro Focuser Speed

To Slow

slide19

Once you have a dot at 100%...

Zoom to 200%

Set ISO to 200

Exposure to 1 Second

Focus till at best focus

setup long exposure
Setup Long Exposure

ISO 800

Large Fine or Raw

Bulb Mode

30 Seconds

5 Second Lead in

Voice Countdown

3 Seconds Between Exposures

setup file naming
Setup File Naming

Set Directory

Set Object Name

http aisig sdaa org
http://aisig.sdaa.org

http://www.sdaa.org