Search found 493 matches

by lothman
Thu Nov 26, 2020 4:56 pm
Forum: Equipment Discussions
Topic: first test of my Sigma 105mm F2.8 DG DN Macro Art
Replies: 13
Views: 248

Re: first test of my Sigma 105mm F2.8 DG DN Macro Art

chris_ma wrote:
Thu Nov 26, 2020 4:46 pm
thanks for the sample images.
quite a bit of distortion - is that around 1:1?
yes 1:1
by lothman
Thu Nov 26, 2020 4:33 pm
Forum: Equipment Discussions
Topic: first test of my Sigma 105mm F2.8 DG DN Macro Art
Replies: 13
Views: 248

Re: first test of my Sigma 105mm F2.8 DG DN Macro Art

and this is a single frame at f2.8 out of the camera on another wafer.

Link to single frame
by lothman
Thu Nov 26, 2020 4:28 pm
Forum: Equipment Discussions
Topic: first test of my Sigma 105mm F2.8 DG DN Macro Art
Replies: 13
Views: 248

first test of my Sigma 105mm F2.8 DG DN Macro Art

just unpacked the lens and did some first test shots on a Sony A7r4 f2.8 - I am quite happy :D run a stack at 50µm -> Zerene pmax, topaz denoise http://www.lolux.de/Lothar/Sigma_105/sigma_105_2,8_1024pixel.jpg crop bottom left http://www.lolux.de/Lothar/Sigma_105/crop_bottom%20left.jpg crop center h...
by lothman
Tue Nov 24, 2020 12:09 pm
Forum: Technical and Studio Photography -- Macro and Close-up
Topic: Amber Inclusions Scorpion & Spider Fighting Forever...LOL
Replies: 12
Views: 220

Re: Amber Inclusions Scorpion & Spider Fighting Forever...LOL

stunning shots, can you give me an idea about the size of this inclusion
by lothman
Thu Nov 19, 2020 12:22 pm
Forum: Equipment Discussions
Topic: Does anyone have the Laowa 100mm x2 macro lens?
Replies: 10
Views: 341

Re: Does anyone have the Laowa 100mm x2 macro lens?

Does anyone else have this lens and can you check if it does this or not? I'm trying to find from as many people as possible before I make the long and annoying drive back to the store. Funny same with my copy, but since I work top down there is no such problem. May be I will cut off a rubber ring ...
by lothman
Wed Nov 18, 2020 12:01 pm
Forum: General Discussion Forum and Community Announcements
Topic: Interesting stuff
Replies: 9
Views: 269

Re: Interesting stuff

could be raw marerial for repivoting worn watchparts. Cut off old pivot, drill, press-fit or glue in a piece of wire, turn to dimensions, polish and reinstall.
by lothman
Mon Nov 16, 2020 9:48 am
Forum: Equipment Exchange
Topic: Sold: Nikon M Plan 20x NA 0.4 ELWD 210/0
Replies: 3
Views: 1980

Re: Nikon M Plan 20x NA 0.4 ELWD 210/0

you have PN
by lothman
Sun Nov 15, 2020 4:40 pm
Forum: Equipment Discussions
Topic: Laowa introduces 100mm f/2.8 2x Macro APO
Replies: 36
Views: 9172

Re: Laowa introduces 100mm f/2.8 2x Macro APO

compared to the Sony FE90 at 1:1 f2.8 on Sony A7r4, Zerene dmap 100% crop
Laowa_vs_Sony_.jpg
by lothman
Wed Oct 28, 2020 4:32 pm
Forum: Equipment Exchange
Topic: Sold: Nikon M Plan 20x NA 0.4 ELWD 210/0
Replies: 3
Views: 1980

Re: Nikon M Plan 20x NA 0.4 ELWD 210/0

make me an offer
by lothman
Wed Oct 28, 2020 9:22 am
Forum: Equipment Discussions
Topic: MJKZZ Extreme system and ...
Replies: 34
Views: 1897

Re: MJKZZ Extreme system and ...

dhmiller wrote:
Wed Oct 28, 2020 9:03 am
The email said, in effect, to stop emailing him - he does not sell to the US. End of that story.
Probably the backside of the US Product Liability. Even if I would buy from them and ship it to you I could probably be sewed if you squeeze your finger.
by lothman
Mon Oct 26, 2020 3:58 pm
Forum: Equipment Discussions
Topic: MJKZZ Extreme system and ...
Replies: 34
Views: 1897

Re: MJKZZ Extreme system and ...

I have not used either the mjkzz ultra nor the stonemaster systems, but I can make some general comments regarding their construction that might be helpful. The mjkzz ultra system is built around an industrial rail system. The system is not specified, but the picture shows something that looks like...
by lothman
Sat Oct 24, 2020 3:44 am
Forum: Equipment Discussions
Topic: Out, out ##### spots!
Replies: 13
Views: 952

Re: Out, out ##### spots!

Chris S. wrote:
Fri Oct 23, 2020 8:43 pm

I don't know what's in your normal lens cleaning fluid. I use ethyl or isopropyl alcohol for cleaning lenses, or if a lens is very grungy, then a bit of ROR.

--Chris S.
what is ROR?
by lothman
Fri Oct 23, 2020 1:24 pm
Forum: Equipment Discussions
Topic: Out, out ##### spots!
Replies: 13
Views: 952

Re: Out, out ##### spots!

do the spots rotate with the lens? or stay in place?