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Old Oct 23, 2002, 9:29 AM   #1
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Default how does 7i work at night/astronomy ?

HI,
I'm going to buy a dimage 7i
It'll be my first camera, but I have an important question to ask everyone:

I'd like to use it expecially at night, I'd like to take photo to the comets, constellations and to the moon, like subject or landscape.

I've a doubt, and my question is:
Does the EVF work correctly at night?
Is it easy take photo?

A friend of mine told me that with Fujifilm S602Z the EVF (and also the TFT 1.8 monitor) is completely black, and it isn't possible see/focus nothing!

I'm Italian, ...sorry for bad my English.
Thanks very much!
Davide
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Old Oct 23, 2002, 12:50 PM   #2
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At night (ie in total darkness) the EVF becomes Black & White and the viewfinder is boosted up very much like a night vision NVG system. The picture is still taken in color... the AF still works believe it or not, but a lot slower (one can sure not focus with a naked eye).
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Old Oct 23, 2002, 1:24 PM   #3
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I don't think you'll find the D7 suitable for any kind of astronomical photography given the low power of the telephoto. Stars are sub-pixel size in the displays so you won't be able to see them anyway. It is a good camera for other types of night work but not stars and is marginal at best for the moon.
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Old Oct 23, 2002, 7:18 PM   #4
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there are photos of the intl space station done by JPL using a 24 inch reflector and a D7. with the proper adapters from what i've seen it is quite useable with many types of telescopes.
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Old Oct 23, 2002, 8:20 PM   #5
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Take a look at this arrangement of telescope + D7:

http://webpages.charter.net/bbiggers...maxview40.html
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Old Oct 23, 2002, 8:29 PM   #6
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Default Re: how does 7i work at night/astronomy ?

Quote:
Originally Posted by davidedm
Does the EVF work correctly at night?
Is it easy take photo?

A friend of mine told me that with Fujifilm S602Z the EVF (and also the TFT 1.8 monitor) is completely black, and it isn't possible see/focus nothing!
I never use D7xx with an telescope. But you won't have a black display since in manual exposition , you have the choice of "as it will come out" ( display the image with current exposition setting) , or with "amplification" , giving you a bright image ( but of course, do not reflect the final image, usefull with flash exposure for example)
What I know is with a bright moon , you can see clearly and focus, and don't need amplification yet ( camera only, nothing attached to lens)

moon:
http://www.pbase.com/image/3886750
well , it's not a terrible shot , just to give you an idea ...(it's a hand held 1/3 sec shot)
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Old Oct 24, 2002, 4:27 AM   #7
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Default Re: how does 7i work at night/astronomy ?

Hi,
thanks for your explanation!
Probably I'm going to use it without a telescope,
but, in the future, it'll be a good idea!
anyway, without it,
do you think that is it easy focous a costellation or a costellation with EVF?

thank!
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Old Oct 24, 2002, 11:48 AM   #8
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Default Re: how does 7i work at night/astronomy ?

Quote:
Originally Posted by davidedm
Hi,
thanks for your explanation!
Probably I'm going to use it without a telescope,
but, in the future, it'll be a good idea!
anyway, without it,
do you think that is it easy focous a costellation or a costellation with EVF?

thank!
Hi Davide,
I think that to use a digital camera for astronomical purpose is a good idea. Now the astronomers use CCD devices only to take pictures of the sky.
It seems to me that you should use a telescope because a 200 mm is too short to shot otherr thighs execept the moon. I think also that will be very difficult or impossible to see stars or constellation in the EVF. A good solution may be a telescope 114/90 cm or like this plus the Maxview40 as said before by kCan.
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Old Oct 24, 2002, 12:08 PM   #9
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Here's my moon version that I have tried:




... and here's some nightshots using the D7's WYSIWYG, or as per KCan, "as it will come out" in the EVF (ie non-NVG amplified), and no meter required!

http://www.pbase.com/nhl/d7_nigh_shots
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Old Oct 24, 2002, 12:25 PM   #10
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Davide and all,

Just come to my mind something a college ( who is in astro/telescope photography stuff) told me once:

Digital is not at the best yet because with very long exposure , the CCD tends to be "saturated" and noise appears noticeably. With film, we don’t have this problem typical to digital only.
(Of course, we talk here about several minutes exposure, which requires also a telescope angle correction motor to “catch” the earth rotation movement. )


NHL,
The pic with the lady on stilt (?) , is it with a flash ?
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