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Equipment Discussions >> Refractors

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theflop
super member


Reged: 02/25/09

Loc: Ortonville, MI
Best Wide Field Refractor ?
      #5623751 - 01/15/13 01:46 AM

I would like to take some high quality wide field shots. What do you recommend for a refractor under $800-1000? I would like the widest view possible with the highest quality for the price. Discuss...



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Jon Isaacs
Postmaster
*****

Reged: 06/16/04

Loc: San Diego and Boulevard, CA
Re: Best Wide Field Refractor ? new [Re: theflop]
      #5623885 - 01/15/13 07:06 AM

Quote:

I would like to take some high quality wide field shots. What do you recommend for a refractor under $800-1000? I would like the widest view possible with the highest quality for the price. Discuss...






Refractors have field curvature, the shorter the focal length, the greater the curvature. For photography, one needs to correct for field curvature so either a scope with a dedicated field flattener or a separate field flattener is required.

The AT65EDQ looks like a very good scope for what you want to do:

AT65EDQ

It is specifically designed for wide field astrophotography, It has the short focal length necessary, it is a quad design an FPL-53 triplet in front with a ED field flattener in back. It has a rack and pinion focuser to handle the weight of your camera...

Jon


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PhilCo126
Post Laureate


Reged: 01/14/05

Loc: coastline of Belgium
Re: Best Wide Field Refractor ? new [Re: Jon Isaacs]
      #5623933 - 01/15/13 07:50 AM

The individual 152/900mm Großfeldrefraktor with 3" crayford focuser is a great (semi-Apo)from Teleskop-express.de


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RogerRZ
Whatta you lookin' at?
*****

Reged: 01/09/06

Loc: West Collette, NB, Canada
Re: Best Wide Field Refractor ? new [Re: PhilCo126]
      #5624050 - 01/15/13 09:25 AM

Quote:

The individual 152/900mm Großfeldrefraktor with 3" crayford focuser is a great (semi-Apo)from Teleskop-express.de






"Highest quality", "semi-apo" and "photography": Pick any two...


Another vote here for the AT65...


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PhilCo126
Post Laureate


Reged: 01/14/05

Loc: coastline of Belgium
Re: Best Wide Field Refractor ? new [Re: RogerRZ]
      #5624065 - 01/15/13 09:37 AM

Well, it's a hard choice with a budget of Euro 700.00

My choice for an AstroPhotography refractor was = http://www.cloudynights.com/item.php?item_id=2800


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snommisbor
scholastic sledgehammer
*****

Reged: 06/15/09

Loc: Cedar Park, TX
Re: Best Wide Field Refractor ? new [Re: PhilCo126]
      #5624339 - 01/15/13 12:46 PM

Honestly you really couldnt go wrong with a nice camera lens for wide field imaging. If you are using a DSLR get a good quality lens and you kill two birds with one stone. A lens for day and night. The guy at Astro Anarchy takes sick photos that are shot with a camera lens.

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Jon Isaacs
Postmaster
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Reged: 06/16/04

Loc: San Diego and Boulevard, CA
Re: Best Wide Field Refractor ? new [Re: PhilCo126]
      #5624578 - 01/15/13 02:52 PM

Quote:

Well, it's a hard choice with a budget of Euro 700.00




It's not so tough if the criteria is the widest possible field of view because that means one can use a small scope, short focal length scope or maybe a camera lens if it doesn't have issues with chromatic aberration.

Jon


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Eddgie
Postmaster
*****

Reged: 02/01/06

Re: Best Wide Field Refractor ? new [Re: theflop]
      #5625264 - 01/15/13 09:48 PM

Well, you can get a very wide field with a small scope, but a used Televue Genesis is a big scope with a big field.

Used the Genesis is less than $1000. Seen them for $800.


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BarrySimon615
Pa Bear
*****

Reged: 03/01/04

Loc: New Orleans, LA
Re: Best Wide Field Refractor ? new [Re: Eddgie]
      #5625493 - 01/16/13 12:07 AM

This may help you in deciding - - -

http://www.bbastrodesigns.com/rft.html

if not that, try this -

http://www.robertmartinayers.org/RFT/

Personally I really like my home-built Jaegers 6" f/5 (laid down September 78, commissioned January 79, shakedown cruise "ongoing")

Barry Simon

Edited by BarrySimon615 (01/16/13 12:10 AM)


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theflop
super member


Reged: 02/25/09

Loc: Ortonville, MI
Re: Best Wide Field Refractor ? new [Re: BarrySimon615]
      #5625533 - 01/16/13 12:55 AM

After looking at the net I will surely be purchasing an AT65EDQ. This is exactly what I am looking for! The 480mm is perfect and the colors of the stars seemed great. Thanks for the info!

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rflinn68
Carpal Tunnel


Reged: 03/09/12

Loc: Arkansas
Re: Best Wide Field Refractor ? new [Re: theflop]
      #5625920 - 01/16/13 10:17 AM

I really like my AT65EDQ. It is one fine scope for widefield imaging. The focal length is 420mm, not 480. With a rotating camera angle adjuster, built-in field flattener, FPL-53 optics, sliding dew shield, included dovetail, very nice mounting rings, and a very capable factory focuser, it is hard to beat.

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theflop
super member


Reged: 02/25/09

Loc: Ortonville, MI
Re: Best Wide Field Refractor ? new [Re: rflinn68]
      #5627408 - 01/17/13 03:35 AM

About 12 hours ago I placed my order for the AT65EDQ from Astronomics by phone. I had a great chat with them and I placed the order for $584 with the Cloudy Nights discount. They said they will receive the scope by air-mail in 4 days then ship it to me so I am very happy with this timing. It leaves little time for me to change my mind! It will be nice as a wide-field scope and as an autoguiding scope placed upon my AT6RC. I found tons of great astrophotos on the net (such as Flickr and Astrobin) that people took with it and it looks like an amazing scope. It seems a far cry better than my first refractor, the Orion 120ST which had huge CA! The 120ST represented stars as big fuzzy blue balls. Thanks for the replies, pals!

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curiosidad
sage


Reged: 06/09/11

Re: Best Wide Field Refractor ? new [Re: theflop]
      #5627483 - 01/17/13 06:14 AM

Hello,
For visual wide Field it is comparable to Takahashi FS-60 ?
Are very like in size and quelities?
Best


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rflinn68
Carpal Tunnel


Reged: 03/09/12

Loc: Arkansas
Re: Best Wide Field Refractor ? new [Re: curiosidad]
      #5627723 - 01/17/13 10:01 AM

Congrats! Thats great that they are getting some more that quick!! I figured you'd have to buy used if you didnt want to wait. Thats awesome!! I'm 100% positive you will enjoy yours as much as I do mine. Be sure to post some pics when you get it

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Tamiji Homma
Post Laureate
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Reged: 02/24/07

Loc: California, USA
Re: Best Wide Field Refractor ? new [Re: curiosidad]
      #5627872 - 01/17/13 11:23 AM

Quote:

Hello,
For visual wide Field it is comparable to Takahashi FS-60 ?
Are very like in size and quelities?
Best




Here is size comparison, not exactly FS-60 but FS-60Q + ExtenderQ 1.6x and AT65EDQ.

To make FS-60Q to FS-60CB, you remove CQ 1.7X Barlow/Flattener.

Both scopes have some challenge (inward focus distance with 2" diagonal) to utilize 2" full aperture eyepiece for wide TFOV visual use. I am satisfied with quality of viewing experience with both scopes.



Tammy


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theflop
super member


Reged: 02/25/09

Loc: Ortonville, MI
Re: Best Wide Field Refractor ? new [Re: Tamiji Homma]
      #5628154 - 01/17/13 02:02 PM

I will be using my scope with a self-modified Canon 450D. I have the 2" T-ring which I use with the AT6RC. I will post pics of everything from opening the box to mounting it in the observatory. This is now my 4th scope purchase and I feel I am just getting started...

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