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Old November 30th, 2006, 05:56 PM   #1
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SGpro's R2 achromat, soon available - 99 ($194)

Hello,

We will soon be making the SGpro's r2 HD achromat available as a seperate item for £99 ($194). It is be in a black anodized 72mm threaded ring (male and female) and fully Anti reflection coated. It is the same achromat used in the SGpro r2 units, and has been tested with the HVX200 and HD100. Its strength is roughly +8 (little stronger the the CO +7)
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Last edited by Wayne Kinney; December 1st, 2006 at 04:44 AM.
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Old December 1st, 2006, 04:01 AM   #2
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Wayne rules!

Seriously, I`m just looking for 72mm HD achromat that would allow close focusing on ca 30x20mm frame with Canon XHA1 from the mod distance of 50-65mm.

Cheers,
T
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Old December 1st, 2006, 04:37 AM   #3
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Yep, i've aready sold a few of these (just the glass) to a few people making there DIYadapters, all have been happy.
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Old January 15th, 2007, 10:46 AM   #4
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Distance between GG and the SGpro achromat?

Hi Wayne, please can you help me out here a little.
I have been playing around with the SGpro achromat but unfortunately I haven`t been able to focus Canon XH A1 properly on 35mm frame.
What am I doing wrong? Achromat`s distance from the gg is somewhere between 40-50mm would that be the reason? It`s positioned about 15mm in front of the camcorder lens.
I tend to believe that the distance between the achro and GG is too short.
Also which side should face the camcorder?

Thanks in Advance,
T
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Old January 15th, 2007, 11:04 AM   #5
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Hi,

Do you have a condenser in the path as well? If not and its just the achromat, then this might be just a little too short distance.

If you have a condenser lens about 4 - 6mm in front of the GG, you might be able to achieve focus then. Its a combination of all these variables.
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Old January 15th, 2007, 11:32 AM   #6
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Im using frensel focusing screen. I`ll cut a custom holder for the achromat and experiment with the longer distance.

Thanks,
T
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Old January 15th, 2007, 11:59 AM   #7
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Hi,

Ok, the fresnel will not help focus wise then. Keep increasing distance until you find focus.

Also, test both orientations of the achromat to see what works best for you.
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Old February 2nd, 2007, 06:27 AM   #8
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Two achromats doubble the power?

Wayne, might it be possible to use two of SGpro R2 achromats to shorten the overall length of the adaptor? Will two achromats result in more powerful achromat? Check your mail when you get the time, I`ve sent you an additional e-mail too.

Thanks,
T
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Old February 2nd, 2007, 03:02 PM   #9
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Hi Wayne

Would this solve some of the edge to edge sharpness issues we had when testing the m2 and the brevis?

Phil
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Old February 2nd, 2007, 04:07 PM   #10
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So when will it be available?(Approximate date?)
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Old February 10th, 2007, 05:07 PM   #11
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Hi,

OK guys, we have the sample 72mm threaded black aluminium ring all done, and its really nice! Im ordering a batch on monday, they should arrive in 3 weeks.

So that's the SGpro R2 achromat in a black aluminium 72mm threaded ring for £99
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Old February 10th, 2007, 06:10 PM   #12
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How will this compare to the redrock/ brevis one wayne?
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Old February 10th, 2007, 07:00 PM   #13
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Hi Phil,

Now there's a tough one to answer;) Your shootout results show the SGpro's images to be sharpest and although the M2 was not setup as well as it could be, I strongly believe this was down to the SGpro's achromat. I've had a little look at both the Redrock and brevis achromat's and they seem pretty much the same.
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Old February 11th, 2007, 06:19 AM   #14
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I will certainly be interested in getting one! is it your 58mm achromat with a 72mm thread?
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Old February 11th, 2007, 06:48 AM   #15
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Yes its the SGpro's Rev2 achromat that we used in the shootout (51mm dia) in a 72mm threaded ring.
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