Search found 2867 matches

by Chris S.
Sun Feb 02, 2020 11:47 am
Forum: Equipment Discussions
Topic: Using 10x objective with Sony A7rii full frame
Replies: 18
Views: 3013

I've PM'd Alison, offering to test a used Mitutoyo objective for her if she wishes.

--Chris S.
by Chris S.
Sun Feb 02, 2020 1:42 am
Forum: Equipment Discussions
Topic: CAD Modelling Goniometers! and a Machinist Inquiry
Replies: 7
Views: 795

Re: CAD Modelling Goniometers! and a Machinist Inquiry

JohnDownie wrote:Do you have his email by chance?
I don't have his email. Just now, though I emailed a mutual contact to see if I can get the email that way.

If I don't get it soon, I'd suggest you just give Don a call.

--Chris S.
by Chris S.
Sat Feb 01, 2020 11:25 pm
Forum: Equipment Discussions
Topic: CAD Modelling Goniometers! and a Machinist Inquiry
Replies: 7
Views: 795

Re: CAD Modelling Goniometers! and a Machinist Inquiry

I am going to marry the bottom goniometer, 40mm metric bolt pattern, to an Imperial rotary stage, so I am going to design an adapter plate to have made. Any suggestions as to machinist who could do the work for a somewhat reasonable cost, either in the US or Canada? John, My fabricator, Don Wilson,...
by Chris S.
Fri Jan 31, 2020 3:31 am
Forum: Equipment Discussions
Topic: Fast LED Strobe for Macro
Replies: 45
Views: 5593

Frans (Fotoopa) made very nice system, which produced great results: https://www.flickr.com/photos/fotoopa_hs/albums/72157644329376535 Frans must have a lot of time on his hands. Incredible link, that's for sure. Thanks for sharing. -JW: PS: I wonder if he has a website. Frans is, to our delight an...
by Chris S.
Fri Jan 31, 2020 12:24 am
Forum: Equipment Discussions
Topic: Looking for suggestions about twin flexible arms for flash
Replies: 33
Views: 3250

Good point about one-handed vs two-handed. . . . Continuing the point, the Wimberley brackets I use seem to require three hands--or at least two hands to hold and adjust the bracket, while the rig is placed somewhere safe with hands off. This is what I meant by "fiddly." Nothing is perfect and all ...
by Chris S.
Thu Jan 30, 2020 12:59 am
Forum: Equipment Discussions
Topic: Nikon PB -5 usage?
Replies: 8
Views: 588

Not going to pursue this due to many difficulties I've seen in online reviews. Dennis, When people ask which Nikon bellows to purchase, the PB-5 is not a model I recommend (it was a feature-reduced, less-expensive version of the highly-regarded, earlier PB-4. And it's entirely different from the fr...
by Chris S.
Wed Jan 29, 2020 11:53 pm
Forum: Equipment Discussions
Topic: Looking for suggestions about twin flexible arms for flash
Replies: 33
Views: 3250

Mark, For completeness, you might want to add Wimberley macro brackets to your list. I've for years had their "Dual arm setup for camera bodies" set. On the downside, it's expensive and a bit fiddly. On the upside, it will let you place flashes in a wide range of positions and hold them there very w...
by Chris S.
Tue Jan 28, 2020 6:34 pm
Forum: Equipment Discussions
Topic: Looking for suggestions about twin flexible arms for flash
Replies: 33
Views: 3250

Sample quality is all over the place with these. Some are usable, others are junk and break in your hand while using them in the field. With no-name parts, this is unsurprising. On the other hand, I'd expect consistency if making something similar out of name-brand parts such as Loc-Line . I haven'...
by Chris S.
Sat Jan 25, 2020 12:10 am
Forum: Equipment Discussions
Topic: LWD Optosigma objectives.
Replies: 26
Views: 1791

I'm going for new ones at Edmund's... Antonio, At least here in the U.S., Thorlabs and Edmund Optics are are both excellent companies to deal with. If European Thorlabs is a little bit cheaper than European Edmund Optics, why not save that bit of money and purchase your Mitutoyo objectives from Tho...
by Chris S.
Fri Jan 24, 2020 1:40 am
Forum: Equipment Discussions
Topic: LWD Optosigma objectives.
Replies: 26
Views: 1791

Note, too, that the numerical apertures are small for a couple of the lenses. The 20x has NA 0.30 (more normal for a 10x); the 50x has NA 0.42. As we know, lower NA means lower resolution. --Chris S. I noticed that too, but I always thought it was a "normal" value for this type of long distance ins...
by Chris S.
Fri Jan 24, 2020 1:16 am
Forum: Equipment Discussions
Topic: LWD Optosigma objectives.
Replies: 26
Views: 1791

Not sure about this but I got a set of these. https://www.edmundoptics.com/f/eo-infinity-corrected-long-working-distance-objectives/13506/ Will see if I'll be able to compare them against the mit 10x and 20x. They are considerably cheaper than the Mitutoyo lenses. That will be an interesting test. ...
by Chris S.
Thu Jan 23, 2020 11:52 pm
Forum: Equipment Discussions
Topic: Zhongyi (Mitakon) Super Macro Lens (1 - 5x)
Replies: 264
Views: 37342

Re: 1x-5x Mitakon starting to ship

From what I saw of the IQ in the first shipment, they had a MAJOR re-engineering job to do. A recent article at Petapixel, Back from the Drawing Board: Mitakon 85mm 1x-5x Macro Lens Redesigned , gives an early look. From the article, it's hard for me to tell if major re-engineering has been done or...
by Chris S.
Thu Jan 23, 2020 2:40 am
Forum: Equipment Discussions
Topic: LWD Optosigma objectives.
Replies: 26
Views: 1791

Note, too, that the numerical apertures are small for a couple of the lenses. The 20x has NA 0.30 (more normal for a 10x); the 50x has NA 0.42. As we know, lower NA means lower resolution.

--Chris S.
by Chris S.
Thu Jan 23, 2020 2:32 am
Forum: Equipment Discussions
Topic: Raynox 5320
Replies: 35
Views: 6266

This is a resurrected 3 year old thread :shock: My bad. I'd looked up this thread to answer an off-line question about the Raynox 5320. Later, when I went to close my browser tabs before bed time, I noticed only the unanswered question at the end. Often during the day, if I see a question and don't...
by Chris S.
Wed Jan 22, 2020 1:51 am
Forum: Equipment Discussions
Topic: Raynox 5320
Replies: 35
Views: 6266

I don't think that either Protostar or Beetle Black are available in or from the the UK easily. Andy, I suggest you try the following: Go into a large crafts store. Here in the states, this would mean the likes of JoAnn Fabrics, Hobby Lobby, or perhaps Michaels. These stores carrya a wide range of ...