Lesson 1: Shutter Speed. Exposure Basics ISO + Shutter Speed + Aperture.
Spherical Mask Shutter assembly
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Transcript of Spherical Mask Shutter assembly
![Page 1: Spherical Mask Shutter assembly](https://reader030.fdocuments.in/reader030/viewer/2022032605/56812c44550346895d90c908/html5/thumbnails/1.jpg)
Robin Lafever 27 May 2004
1
TMA-65 Cassegrain shutter fitup
A comparison of fits and clearances for Cassegrain shutter models current under study, using beam envelopes for ‘Scientifically useable’ light developed from Mike Lampton’s TMA-65 Ray Traces
Spherical Mask Shutter assembly
Modified spherical Mask Shutter Assembly
Flat Mask shutter Assembly
![Page 2: Spherical Mask Shutter assembly](https://reader030.fdocuments.in/reader030/viewer/2022032605/56812c44550346895d90c908/html5/thumbnails/2.jpg)
Robin Lafever 27 May 2004
2
TMA-65 Cassegrain shutter fitup
TMA-65
![Page 3: Spherical Mask Shutter assembly](https://reader030.fdocuments.in/reader030/viewer/2022032605/56812c44550346895d90c908/html5/thumbnails/3.jpg)
Robin Lafever 27 May 2004
3
TMA-65 Cassegrain shutter fitup
TMA-65 Cassegrain Focus
![Page 4: Spherical Mask Shutter assembly](https://reader030.fdocuments.in/reader030/viewer/2022032605/56812c44550346895d90c908/html5/thumbnails/4.jpg)
Robin Lafever 27 May 2004
4
TMA-65 Cassegrain shutter fitup
Detailed Beam Envelope
Detector assembly43.16 mm pitch
Generic Fold-Flat mirrorWith “scientifically useable” light footprint
Tertiary mirror
Spherical MaskAt the Cassegrain focus
Beam envelope constructed fromMike Lampton’s Ray Traces
![Page 5: Spherical Mask Shutter assembly](https://reader030.fdocuments.in/reader030/viewer/2022032605/56812c44550346895d90c908/html5/thumbnails/5.jpg)
Robin Lafever 27 May 2004
5
TMA-65 Cassegrain shutter fitup
Spherical Mask Shutter assemblyClosed
‘Stovepipe’ Baffle Assembly
![Page 6: Spherical Mask Shutter assembly](https://reader030.fdocuments.in/reader030/viewer/2022032605/56812c44550346895d90c908/html5/thumbnails/6.jpg)
Robin Lafever 27 May 2004
6
TMA-65 Cassegrain shutter fitup
Spherical Mask Shutter assemblyOpen
Open shutters interfere with beam envelope
‘Stovepipe’ Baffle Assembly
![Page 7: Spherical Mask Shutter assembly](https://reader030.fdocuments.in/reader030/viewer/2022032605/56812c44550346895d90c908/html5/thumbnails/7.jpg)
Robin Lafever 27 May 2004
7
TMA-65 Cassegrain shutter fitup
Spherical Mask Shutter assembly Closed
![Page 8: Spherical Mask Shutter assembly](https://reader030.fdocuments.in/reader030/viewer/2022032605/56812c44550346895d90c908/html5/thumbnails/8.jpg)
Robin Lafever 27 May 2004
8
TMA-65 Cassegrain shutter fitup
Modified spherical Mask Shutter Assembly Closed
Shutter blades and motorsMoved up near knife blade
![Page 9: Spherical Mask Shutter assembly](https://reader030.fdocuments.in/reader030/viewer/2022032605/56812c44550346895d90c908/html5/thumbnails/9.jpg)
Robin Lafever 27 May 2004
9
TMA-65 Cassegrain shutter fitup
Spherical Mask Shutter assembly Open
![Page 10: Spherical Mask Shutter assembly](https://reader030.fdocuments.in/reader030/viewer/2022032605/56812c44550346895d90c908/html5/thumbnails/10.jpg)
Robin Lafever 27 May 2004
10
TMA-65 Cassegrain shutter fitup
Modified spherical Mask Shutter Assembly Open
‘Stovepipe’ Baffle Assembly
![Page 11: Spherical Mask Shutter assembly](https://reader030.fdocuments.in/reader030/viewer/2022032605/56812c44550346895d90c908/html5/thumbnails/11.jpg)
Robin Lafever 27 May 2004
11
TMA-65 Cassegrain shutter fitup
Modified spherical Mask Shutter Assembly Open
Open shutters clearthe beam envelope
![Page 12: Spherical Mask Shutter assembly](https://reader030.fdocuments.in/reader030/viewer/2022032605/56812c44550346895d90c908/html5/thumbnails/12.jpg)
Robin Lafever 27 May 2004
12
TMA-65 Cassegrain shutter fitup
Modified spherical Mask Shutter Assembly Closed
![Page 13: Spherical Mask Shutter assembly](https://reader030.fdocuments.in/reader030/viewer/2022032605/56812c44550346895d90c908/html5/thumbnails/13.jpg)
Robin Lafever 27 May 2004
13
TMA-65 Cassegrain shutter fitup
Modified spherical Mask Shutter Assembly Open
![Page 14: Spherical Mask Shutter assembly](https://reader030.fdocuments.in/reader030/viewer/2022032605/56812c44550346895d90c908/html5/thumbnails/14.jpg)
Robin Lafever 27 May 2004
14
TMA-65 Cassegrain shutter fitup
Flat Mask shutter Assembly Open
‘Stovepipe’ Baffle Assembly
![Page 15: Spherical Mask Shutter assembly](https://reader030.fdocuments.in/reader030/viewer/2022032605/56812c44550346895d90c908/html5/thumbnails/15.jpg)
Robin Lafever 27 May 2004
15
TMA-65 Cassegrain shutter fitup
Flat Mask shutter Assembly Closed
‘Stovepipe’ Baffle Assembly
![Page 16: Spherical Mask Shutter assembly](https://reader030.fdocuments.in/reader030/viewer/2022032605/56812c44550346895d90c908/html5/thumbnails/16.jpg)
Robin Lafever 27 May 2004
16
TMA-65 Cassegrain shutter fitup
Flat Mask shutter Assembly Open
Innermost corners of the mask knife edgesAre at the Cass focus.
![Page 17: Spherical Mask Shutter assembly](https://reader030.fdocuments.in/reader030/viewer/2022032605/56812c44550346895d90c908/html5/thumbnails/17.jpg)
Robin Lafever 27 May 2004
17
TMA-65 Cassegrain shutter fitup
Flat Mask shutter Assembly Closed