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aecrimla

13 Oct 2006 17:51


care este diferenta intre....

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am cautat pe net ceva ccd astro cam shi am gasit 2 firme la care m-am oprit:
Celestron
Meade

1.

Celestron are doar o singura camera CCD shi anume 

NexImage
http://www.celestron.com/c2/product.php?CatID=50&ProdID=354

asta este doar pt sistemul solar shi atat ; la DSO cred ca nu se preteaza.

2.

Meade are mai multe CCD castro cam dar am intrat in ceatza la descrieri shi caracteristici.

S-o luam deci pe rand.

2a.

Meade LPI Imager:

http://www.opticsplanet.net/meade-autostar-suite-and-lunar-planetary-imager-lpi-packag.html
pt sistemul solar, sa zicem, pt DSO = nu.

pretz aprox 100 parai

2b.

Deep Sky Imager

http://www.meade.com/dsi/index.html

CCD Sensor:    High Sensitvity Sony&reg; Super HAD&#8482; Color CCD Sensor 
Pixels          :    510 x 492 pixels (250,000 pixels) 
Pixel Size (in microns):    9.6 microns (W) x 7.5 microns (H) 
A/D Conversion:    16-bit (greater image depth and contrast) 
Min.-Max. Exposure Time:    1/10,000 of a second to one hour 
Housing:    Anodized die-cast aluminum 
USB Compatibility:    USB 2.0 High Speed and 1.1 

pretz aprox 300 parai

2c.

Meade Deep Sky Imager Pro II DSI II Pro Monochrome CCD Astro-Imager

http://www.opticsplanet.net/meade-deep-sky-imager-pro-ii-mono.html

CCD Sensor:    High Sensitivity Monochrome Sony EXview HADT CCD Sensor(ICX429ALL 
Chip Dimensions v: 5.59mm (w) x 4.68mm (h); 8mm diagonal (type 1/2)
  Pixel Size (in microns) : 8.3 microns (w) x 8.6 microns (h)
 Temperature Sensor:   Built in temperature sensor measures degrees in celsius and matches it to each dark frame  
 
A/D Conversion:    16-bit (greater image depth and contrast) 
Min. - Max. Exposure Time:    1/10,000 of a second to one hour 
Housing:    Anodized die-cast aluminum 
USB Compatibility:    High Speed 2.0 and 1.1 

pretz aprox...600 parai.

2d.

Meade Deep Sky Imager II Color CCD Camera DSI II w/ Meade Autostar Suite

http://www.opticsplanet.net/meade-deep-sky-imager-ii-color.html

CCD Sensor:    High Sensitivity Color Sony EXview HAD CCDT Sensor (ICX429AKL) 
 
Chip Dimensions: 5.59mm (w) x 4.68mm (h); 8mm diagonal (type 1/2)
 Pixels:  752 x 582 pixels (437,664 pixels) 
 
Pixel Size (in microns) : 8.3 microns (w) x 8.6 microns (h)
 Temperature Sensor:  Built in temperature sensor measures degrees in celsius and matches it to each dark frame 
 
A/D Conversion:    16-bit (greater image depth and contrast) 
 
Min. - Max. Exposure Time:    1/10,000 of a second to one hour 
 
Housing:    Anodized die-cast aluminum 
 
USB Compatibility:    High Speed 2.0 and 1.1 


price aprox 600 Parai


2e.

Meade Deep Sky Imager Pro II Kit w/ Meade Autostar Suite & Meade RGB Color Filter Set 

http://www.opticsplanet.net/meade-deep-sky-imager-pro-ii-kit.html

CCD Sensor:    High Sensitivity Monochrome Sony EXview HADT CCD Sensor(ICX429ALL) 
 
Chip Dimensions : 5.59mm (w) x 4.68mm (h); 8mm diagonal (type 1/2)
 Pixels:     752 x 582 pixels (437,664 pixels) 
 
Pixel Size (in microns) : 8.3 microns (w) x 8.6 microns (h)
 Temperature Sensor:     Built in temperature sensor measures degrees in celsius and matches it to each dark frame 
 
A/D Conversion:    16-bit (greater image depth and contrast) 
 
Min. - Max. Exposure Time:    1/10,000 of a second to one hour 
 
Housing:    Anodized die-cast aluminum 
 
USB Compatibility:    High Speed 2.0 and 1.1 


pretz aprox 700 parai.

intrebare.care este mai buna daca 2c,2d,2e, au cam acelashi pretz dar 2 dintre ele au CCD monochrom, ?
care-i shpilu la CCd color sau Monochrom.?


merci

PS : sa nu-mi zicetzi ca sunt shi camere web care se pot modifika sa le foloseshti la astro foto ca nu am nervi sa m-apuk akum sa le modifik, doar daca cineva are 1 Philips Vesta de vanzare .. la aia m-ash pune sa o fac astro ca am auzit ca-i cea mai bune,
iar pt o astro CCd cam nu dau mai mult de 1000 USD ca nu vreau .
Deshi am Canon 300 DSLR am vazut cat de greu este cu mantura + filtre + Barlow lens , ca trage Montura telescopului in jos.... tre' s'o tzin cu mana.

astea am intzeles ca's mult mai ushoare shi au cam aceleashi caracteristici, iar in plus potzi vizualiza poza inainte de a o face , ceea ce la DSLR nu se poate iar daca incerci sa fokalizezi in vizor iese kam de KKt, ...am incercat ieri timp de o ora shi numic din ce am vazut in vizorul Camerei pe kalk erau poze slab fokalizate sau sub expuse , chiar daca pe ecranul DSLR-ului erau ok.
Nu ma mai incurc cu DSLR-ul .Face poze bune dar din 100 doar 1 % se pot folosi.
iar o kamera DSLR Astro face prea mult ca sa-mi cumpar.

Deci rog pareri pro shi contra la CCd astro descrise mai sus.....


Merci.

