Search found 1656 matches

by RobertOToole
Sat Mar 07, 2020 1:19 pm
Forum: Equipment Discussions
Topic: shared reference silicon wafer for comparisons
Replies: 139
Views: 18043

Macro-cosmos, where does one get these? No idea where MacroCosmos sourced his but there are two for sale on eBay now for$100+. I'm used to paying something like $10 each...not $100+. https://www.ebay.com/itm/Very-Rare-Copper-12-IC-Microchip-Silicon-Pattern-Wafer-with-Blue-Background/233511904329? h...
by RobertOToole
Fri Mar 06, 2020 8:23 pm
Forum: Equipment Discussions
Topic: Quick test cpn28/4 stacked vs lomo 3.7stacked vs MP-E
Replies: 2
Views: 776

Re: Quick test cpn28/4 stacked vs lomo 3.7stacked vs MP-E

Hi, I just did a quick comparison for my personal use, but maybe it is still usefull to someone: -Componon 28/4 reversed, iris transformed by Robert O'toole, stacked on MakroSymmar fixed iris 120/5.6 mag ca 4X -Lomo 3.7, stacked on MakroSymmar fixed iris 120/5.6 mag ca 3.6X-3.8X -Canon MP-E 65mm at...
by RobertOToole
Fri Mar 06, 2020 8:01 pm
Forum: Equipment Discussions
Topic: shared reference silicon wafer for comparisons
Replies: 139
Views: 18043

Macro_Cosmos wrote: Here's what the thing looks like:
Image
This is a 12 inch wafer, I might have this one?

I have too many disks they are starting to look alike :shock:

Good job finding this one MC!

Best,

Robert
by RobertOToole
Fri Mar 06, 2020 7:58 pm
Forum: Equipment Discussions
Topic: I need some guidance
Replies: 7
Views: 1020

Another option is the Wemacro Raynox 150 tube lens (Pro). https://www.wemacro.com/?product=raynox-dcr-150-tube-lens-pro Best, This is a nice option for a turn-key setup. I would recommend 2 inch/M52/SM2 system parts over M42 x 1mm units. Pro-tip: Watch out when using this type of QR clamp. I would ...
by RobertOToole
Fri Mar 06, 2020 7:29 pm
Forum: Equipment Discussions
Topic: I need some guidance
Replies: 7
Views: 1020

Re: I need some guidance

Hi Db, I have a Sony A77 (A mount) and Mitutoyo M plan A 10X objective lens. I'm currently using the objective through a Mitutoyo to RMS adaptor, and then an adaptor plate from RMS to filter threads, on a 200mm zoom lens from Sony. I'd like to move to a tube lens setup using Thorlabs or Raynox, but ...
by RobertOToole
Wed Mar 04, 2020 6:25 pm
Forum: Equipment Discussions
Topic: Schneider Componon 35mm f4 4/35 Lens Test Online
Replies: 32
Views: 4826

Yeah, I am realising I might need to go the Thorlabs route to make this work. It's gonna cost a bit, but it seems way more flexible once you're set up. I guess you go from whatever thread size on the various lenses to m42 and then m43 to SM2 adapters? You indicated that M52 will be compatible Accor...
by RobertOToole
Tue Mar 03, 2020 10:52 pm
Forum: Equipment Discussions
Topic: Schneider APO Digitar 120mm 1x and Tube Lens Test
Replies: 10
Views: 1620

I decided on the regular Macro symmar, it had the best price and since I am going to use it as tube lens. Let's hope for a safe shipment and no fungal growth. The "Regular" Makro Symmar is excellent, one of my favorite lenses ever :D 80 or 120mm? The 120 is better. I just finished running a quick t...
by RobertOToole
Tue Mar 03, 2020 10:46 pm
Forum: Equipment Discussions
Topic: Schneider Componon 35mm f4 4/35 Lens Test Online
Replies: 32
Views: 4826

My Mejiro has no threads in the front so attaching a reversed lens to it is problematic. I mount both lenses inside a threaded lens tube from Thorlabs so filter threads or lack of filter threads aren't an issue. I tried finding the distance for infinity, but couldn't really work it out, nothing see...
by RobertOToole
Tue Mar 03, 2020 10:38 pm
Forum: Equipment Discussions
Topic: Schneider Componon-S 135mm vs Raynox DCR-250 Tube Lens Test
Replies: 12
Views: 1430

Thanks for the test, they look quite similar in performance, except for that field curvature in the edges. Would that clear up with stacking? Yes it would, the Raynox was more curved as it moved away from the center. I believe it took something like 50% more frames than the Componon, 100 vs 50 mayb...
by RobertOToole
Tue Mar 03, 2020 8:08 am
Forum: Equipment Discussions
Topic: Rodenstock Rodagon 150mm f/5.6 rear diamater?
Replies: 20
Views: 1927

When I bought my set of Mitutoyo objectives (none new), I must have been very lucky. I returned only one, which looked as if it had been shot blasted. All the others were great, which I can say with confidence as each has been tested against multiple samples belonging to other people. Lately, in pa...
by RobertOToole
Mon Mar 02, 2020 8:53 am
Forum: Equipment Discussions
Topic: Rodenstock Rodagon 150mm f/5.6 rear diamater?
Replies: 20
Views: 1927

Just saw this article after I hit submit.

Imagine all the small businesses impacted if Canon is impacted, there will be big ripples in the industry.

Image
by RobertOToole
Mon Mar 02, 2020 8:33 am
Forum: Equipment Discussions
Topic: Saving a Schneider Componon From the Trash Bin
Replies: 6
Views: 955

Indeed, a job well done, and well worth the effort. I have complete disassembled and reassembled a couple of irises, mostly microscope field and condenser irises. It's definitely a bit of an hassle, especially the first time, but I no longer feel any fear. The last leaf is always the trickiest. I'v...
by RobertOToole
Mon Mar 02, 2020 8:26 am
Forum: Equipment Discussions
Topic: Saving a Schneider Componon From the Trash Bin
Replies: 6
Views: 955

Good job, Robert! Those vintage lenses can have all sorts of mechanical problems as you've shown but there are frequent cases of optics related issues as well like delamination or fungus. I am successfully curing both so there are many lenses in my collection bought with "for parts or not working" ...
by RobertOToole
Mon Mar 02, 2020 8:21 am
Forum: Equipment Discussions
Topic: Saving a Schneider Componon From the Trash Bin
Replies: 6
Views: 955

Great job, Robert! Last time I tried to reassemble an iris, I quickly gave up and tossed the components in the trash. (The assembly was going into the trash anyway--I just wanted to take a stab at reassembling an iris--a very brief stab, as it happened. The assembly you fixed does look a bit more r...
by RobertOToole
Mon Mar 02, 2020 8:15 am
Forum: Equipment Discussions
Topic: Rodenstock Rodagon 150mm f/5.6 rear diamater?
Replies: 20
Views: 1927

Glad to help Chris. Yes, the 100x was purchased used. Also I agree that the IQ is probably not what it could be. This is the last lens from a full set I had at one point, actually a set of M Plans and BD Plans. I found a 50x M Plan with a chipped front element for $50 on eBay so I bought it for a pr...