Search found 2748 matches

by ray_parkhurst
Mon Oct 19, 2020 7:38 pm
Forum: Equipment Discussions
Topic: Canon DSLR discounts
Replies: 9
Views: 384

Re: Canon DSLR discounts

I purchased the 5DSR twice and sent it back both times. Was hoping for an improved IQ vs my HRT2i but the performance was basically on-par. It has more MP, and I expected a tailor-made / much newer processing engine to perform better, but alas it was not the case. You're probably wondering "why did ...
by ray_parkhurst
Sat Oct 17, 2020 11:18 am
Forum: Equipment Discussions
Topic: Micro-Symmar 3.5x
Replies: 32
Views: 953

Re: Micro-Symmar 3.5x

are these results to be expected based on the MTF's in the spec sheet?... the micro-symmar 3.5x when compared with the macro-symmar 5.6/80 1x show significantly reduced performance (results that is at the rated/designed magnification scale for each lens). or am I reading this incorrectly? MTF curve...
by ray_parkhurst
Fri Oct 16, 2020 5:45 pm
Forum: Equipment Discussions
Topic: Micro-Symmar 3.5x
Replies: 32
Views: 953

Re: Micro-Symmar 3.5x

The king of 3.5x still goes to the Rayfact I suppose, which needs 600mm of tubing. Or some lens combo, which would need no extension at all.... I'm not sure if any combo giving 3-3.5x magnification has been found with coverage beyond FF. I tested the RF3p5x out to 86mm IC and it actually improved s...
by ray_parkhurst
Thu Oct 15, 2020 5:01 pm
Forum: Equipment Discussions
Topic: Schneider locking screws
Replies: 28
Views: 1108

Re: Schneider locking screws

So far only 3 folks have signed up (two each) for the thumbscrew group order, so not enough yet for the minimum. I'm still hoping for more folks so PM me if you are interested. I'm going to buy 2 so we need several more folks.
by ray_parkhurst
Wed Oct 14, 2020 9:13 am
Forum: Equipment Discussions
Topic: Micro-Symmar 3.5x
Replies: 32
Views: 953

Re: Micro-Symmar 3.5x

rjlittlefield wrote:
Wed Oct 14, 2020 8:37 am
In the animation, it seems clear to my eyes that the f/2.8 image is showing finer detail, but the overall contrast is a little lower.

Do you see it differently?

--Rik
Yes, staring at the animation I agree the 2.8 shows finer detail, but worse CA and contrast.
by ray_parkhurst
Tue Oct 13, 2020 9:11 pm
Forum: Equipment Discussions
Topic: Micro-Symmar 3.5x
Replies: 32
Views: 953

Re: Micro-Symmar 3.5x

For folks who don't want to download and pixel peep the above, here's an animation at 200% near the center of the scratch:
50MS3p5x aperture sweep animation.gif
by ray_parkhurst
Tue Oct 13, 2020 3:49 pm
Forum: Equipment Discussions
Topic: Micro-Symmar 3.5x
Replies: 32
Views: 953

Re: Micro-Symmar 3.5x

I received the 3.5x lens today and ran some initial tests. First I did center-corner comparison at f2.8, but the CAs and resolution were not impressive, so I did a center aperture sweep. The sweep shows an optimum aperture for resolution and CAs between f3.5-f4.0. It's very disappointing to see this...
by ray_parkhurst
Sat Oct 10, 2020 2:42 pm
Forum: Equipment Discussions
Topic: Schneider locking screws
Replies: 28
Views: 1108

Re: Schneider locking screws

Again, PM me if you need any of the smaller screws. I'm hoping to place an order next week.

Especially anyone from EU/UK please let me know soon since I'll need to include yours with the shipment to Macrero in order to lower the overall shipping cost.
by ray_parkhurst
Sat Oct 10, 2020 2:40 pm
Forum: Equipment Discussions
Topic: Schneider locking screws
Replies: 28
Views: 1108

Re: Schneider locking screws

I just checked the measurements of the locking screws from a Unifoc-58, a MacroVaron, and a V-Mount 120mm Makro-Symmar. I measured both the MV and Makro-Symmar screws (on right of image) as 2.44mm in diameter, with an approximate threaded length of 4mm. However, the Unifoc screw (on left) measures ...
by ray_parkhurst
Thu Oct 08, 2020 7:44 am
Forum: Equipment Discussions
Topic: Micro-Symmar 3.5x
Replies: 32
Views: 953

Re: Micro-Symmar 3.5x

I was looking into this lens a while ago and from all I could find it's an excellent performer. what is strange is that the datasheet shows MTF curves for F2.3 F2.5 and F3.4 while the lens is labeled as an F2.8 lens. I suspect it should perform about the same as the inspec.x F4/105 with significant...
by ray_parkhurst
Wed Oct 07, 2020 11:57 am
Forum: Equipment Discussions
Topic: Micro-Symmar 3.5x
Replies: 32
Views: 953

Re: Micro-Symmar 3.5x

And this seller has 4? That's crazy. The lens was discontinued, somehow not too long ago. It's definitely very capable, the shorter WD might even mean it's more resolving? I won't jump to conclusions, need to see an actual comparison. That pricetag though, very high. Not something I'll be intereste...
by ray_parkhurst
Wed Oct 07, 2020 11:50 am
Forum: Equipment Discussions
Topic: Sigma 105mm F2.8 DG DN MACRO Art
Replies: 8
Views: 352

Re: Sigma 105mm F2.8 DG DN MACRO Art

I rarely get excited about regular lenses, but this one has me very interested. I need to review the references but this may be something I end up purchasing when I get my next camera.
by ray_parkhurst
Wed Oct 07, 2020 8:12 am
Forum: Equipment Discussions
Topic: Micro-Symmar 3.5x
Replies: 32
Views: 953

Re: Micro-Symmar 3.5x

Lou Jost wrote:
Wed Oct 07, 2020 8:09 am
Yep, I was wrong, sorry about that!
The seller was wrong in the auction title, causing confusion all around.
by ray_parkhurst
Wed Oct 07, 2020 8:08 am
Forum: Equipment Discussions
Topic: Micro-Symmar 3.5x
Replies: 32
Views: 953

Re: Micro-Symmar 3.5x

Many thanks, Ray! I have been watching eBay for well over a year for this lens. When it does finally show up, the seller misspelled the name, and I would have missed it except for your post here. You're very welcome! I see a second lens sold and I'd guess it's yours. I figured there were others out...
by ray_parkhurst
Wed Oct 07, 2020 7:41 am
Forum: Equipment Discussions
Topic: Micro-Symmar 3.5x
Replies: 32
Views: 953

Re: Micro-Symmar 3.5x

Indeed it is a "Micro-Symmar", I believe Schneider's only lens with this designation.

I have one on the way to me. We'll see how well it performs.