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)

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

Yep, i've aready sold a few of these (just the glass) to a few people making there DIYadapters, all have been happy.

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

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.

I´m using frensel focusing screen. I`ll cut a custom holder for the achromat and experiment with the longer distance.

Thanks,
T

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.

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

Hi Wayne

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

Phil

So when will it be available?(Approximate date?)

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

How will this compare to the redrock/ brevis one wayne?

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.

I will certainly be interested in getting one! is it your 58mm achromat with a 72mm thread?

Yes its the SGpro's Rev2 achromat that we used in the shootout (51mm dia) in a 72mm threaded ring.