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Equipment Discussions >> Electronically Assisted Astronomy

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dragonslayer1
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Reged: 02/25/12

Loc: SLC, UT
Re: protable tv for millicam new [Re: Jamie]
      #5539858 - 11/26/12 06:44 AM

http://mallincam.tripod.com/id49.html this is what we are talking about, something to view this type video on, mostly in the field, something portable. Also there are many varieties of these type cameras

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A. Viegas
Pooh-Bah
*****

Reged: 03/05/12

Loc: New York City/ CT
Re: protable tv for millicam new [Re: dragonslayer1]
      #5540872 - 11/26/12 07:31 PM

my 9" Sony Portable DVD has 800x480 resolution. I found it on sale last year on Amazon for $89. Like Larry said, the ideal is a monitor with Svideo input, most DVD players only have composite input option, but again it depends on what you are trying to do, if it's real time viewing only then go with a more expensive LCD with high contrast or a Speco CRT. If you are using the small screen just for alignment or are mostly capturing or viewing images on the computer, then I think a low end display is not that big a deal. But again for around $100 you can find a reasonable combination of resolution, size and portability.

Al


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ccs_hello
Postmaster
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Reged: 07/03/04

Re: protable tv for millicam new [Re: A. Viegas]
      #5545069 - 11/29/12 08:06 AM Attachment (59 downloads)

Both Al and I had mentioned in the past (e.g., this CN thread) of the great deals on some selected SONY DVD Players.
(1) must have A/V input selector switch (to take video input as a video monitor)
(2) must use 800x480 high resolution LCD glass
Note: some recent SONY models do not have these.

Here is a test shot of a model (9" wide 800x480, 500:1 dynamic contrast, 6 hour battery and unbelievable low price.)

For comparison, other test shots of display devices are here in CN.

(Sorry if this ruins the current low price market on some discontinued models...)

Clear Skies!

ccs_hello


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dragonslayer1
Pooh-Bah


Reged: 02/25/12

Loc: SLC, UT
Re: protable tv for millicam new [Re: ccs_hello]
      #5545896 - 11/29/12 05:43 PM

You should add that to best of forum page

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ccs_hello
Postmaster
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Reged: 07/03/04

Re: protable tv for millicam new [Re: ccs_hello]
      #5553167 - 12/04/12 12:18 AM Attachment (51 downloads)

Let me share a detailed analysis of a SONY 2011 version of a 9" player (2-digit number, as opposed to 2012's 3-digit model number), both to be 800x480 resolution.

The LCD glass has the dimension of 200x110mm (8.98" diag) at 800x480 pixel resolution. The pixel pitch is 0.229mm (H) x 0.25mm (W), i.e., not exactly 1:1. See picture below.

====================
Video Mode (analog)
====================

Using NTSC video as the player's input:

"Normal" (uses 600x480 pixels) at 147mmx110mm display area (4:3 aspect ratio)

"Full" (uses 800x480 pixels) at 200mmx110mm display area (20:11 aspect ratio)


====================
Movie Mode (digital)
====================

In (MPEG4) Movie mode using USB flash drive, max video resolution is 720x480 and file has to be in MP4 simple profile format.

"Normal" (uses 600x422 pixels) at 147mmx97mm display area (3:2 aspect ratio)

"Full" (uses 800x422 pixels) at 200mmx97mm display area (2:1 aspect ratio)

"Zoom" (uses 800x464 pixels) at 200mmx106mm display area (15:8 aspect ratio)


===========================
Picture Mode (digital data)
===========================

Best-fit JPEG file should be in 4:3 aspect ratio, e.g., 640x480 resolution

"Normal" (uses 530x464 pixels) at 132mmx101mm display area (4:3 aspect ratio)

"Full" (uses 720x464 pixels) at 180mmx101mm display area (16:9 aspect ratio)

"Zoom" (uses 720x480 pixels) at 180mmx110mm display area (5:3 aspect ratio)


I was hoping for the player's display system is using a simple pixel-mapping method to preserve picture quality. Turn out to be interpolation everywhere while H and V stretched differently!

Well, I got my unit cheap so no complains .

Clear Skies!

ccs_hello


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A. Viegas
Pooh-Bah
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Reged: 03/05/12

Loc: New York City/ CT
Re: protable tv for millicam new [Re: ccs_hello]
      #5554353 - 12/04/12 05:50 PM

Only negative for me with the Sony DVD player is that it only has composite input. Wish it had Svideo... oh well...

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ccs_hello
Postmaster
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Reged: 07/03/04

Re: protable tv for millicam new [Re: A. Viegas]
      #5556077 - 12/05/12 05:55 PM Attachment (44 downloads)

Now, a 2012 version of a SONY 3-digit numbered model:
Adding a close-up shot of the same text, note the Spec and features are almost identical.

Can you tell the difference?

Also a test, using this displayed text as an example, can you tell why this type of LCD arrangement is more beneficial?


Edited by ccs_hello (12/05/12 08:26 PM)


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ccs_hello
Postmaster
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Reged: 07/03/04

Re: protable tv for millicam new [Re: ccs_hello]
      #5569787 - 12/13/12 07:23 PM

Today only (12/13/12) mfg refurb, 1 yr part/labor warranty:
http://www.ebay.com/itm/Sony-DVP-FX970-9-inch-Portable-DVD-Player-DVPFX970-/2...

$90 w/ free shipping


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nytecam
Postmaster


Reged: 08/20/05

Loc: London UK
Re: protable tv for millicam new [Re: Jamie]
      #5570330 - 12/14/12 05:10 AM

Quote:

Nytecam, Is this similar to waht you are using?
http://www.optcorp.com/product.aspx?pid=17731
Jamie


No Jamie - mine is the ICX429AK Sony Exview interline colour CCD eg same sensor size but larger pixels for 720x580p array.

Interestingly the Starlight Xpress site doesn't mention the colour version of Superstar Autoguider but I understand the mono and colour chips are the same price and, of course, this cam too is suitable for both prime [one-shot colour] imaging and autoguiding another scope


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Jamie
member


Reged: 05/08/05

Loc: Cortez, FL
Re: protable tv for millicam new [Re: nytecam]
      #5593862 - 12/29/12 07:24 AM

Thanks Maurice - I just saw this post - I sent you a private email last night with the same question, but with a more specific topic.

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