Search found 1160 matches

by Ichthyophthirius
Fri Mar 12, 2021 8:59 am
Forum: Equipment Discussions
Topic: Nikon CFN Fluor / Planapo 100 160/0.17
Replies: 60
Views: 8119

Re: Nikon CFN Fluor / Planapo 100 160/0.17

Does that intermediate tube only add extension or has some kind of optics in it? I saw 1.25x intermediate tubes for BH-2 also but if it is just extra extension it would just need a simple modification It contains a tube lens system that compensates for the additional length of the intermediate tube...
by Ichthyophthirius
Fri Mar 12, 2021 5:46 am
Forum: Equipment Discussions
Topic: Nikon CFN Fluor / Planapo 100 160/0.17
Replies: 60
Views: 8119

Re: Nikon CFN Fluor / Planapo 100 160/0.17

I can't tell the coverage in detail. My Optiphot 2 has a 1.25x intermediate tube so I never run into issues with my APS-C camera sensor because I only see the center of the image.

The CF and CFN Plan objectives are designed for FN 26.5 so you shouldn't run into problems with the 10:1 I would think.
by Ichthyophthirius
Fri Mar 12, 2021 5:17 am
Forum: Equipment Discussions
Topic: Nikon CFN Fluor / Planapo 100 160/0.17
Replies: 60
Views: 8119

Re: Nikon CFN Fluor / Planapo 100 160/0.17

CFN Apo 10/45 would be my choice but truth is even just an older CF 10/0.50 Fluor or CF 10/0.40 would be more than enough for now unless someone advices against them. I have/had all three. The CFN Plan Apo 10/0.45 is amazing in brightfield use, you will be pleased. The CF Plan Apo 10x/0.40 is also ...
by Ichthyophthirius
Thu Mar 11, 2021 3:29 pm
Forum: Equipment Discussions
Topic: Nikon CFN Fluor / Planapo 100 160/0.17
Replies: 60
Views: 8119

Re: Nikon CFN Fluor / Planapo 100 160/0.17

Hi, I like the Fluor 40/0.85. It's meant for fluorescence applications, but it's very useful for pondlife and vintage slides because of the very long working distance of 0.37 mm. It's got a correction collar that the Plan Apo 20/0.75 doesn't have (WD 0.64 mm) but the working distance is longer than ...
by Ichthyophthirius
Tue Mar 09, 2021 8:12 am
Forum: Equipment Discussions
Topic: Stacked lenses and chromatic aberration...
Replies: 13
Views: 2234

Re: Stacked lenses and chromatic aberration...

I'm wondering if just one quality APO lens in a system is enough to control the amount of chromatic aberration (CA). Hi Rick, Also make sure you're using/understanding the apochromatic properties of the objective correctly. Some apochromatic microscope objectives (Zeiss, Leitz and anything before 1...
by Ichthyophthirius
Sat Mar 06, 2021 12:39 pm
Forum: Equipment Discussions
Topic: Looking for serial numbers: Laowa 100mm 2x EF automatic with RF compatibility
Replies: 0
Views: 1281

Looking for serial numbers: Laowa 100mm 2x EF automatic with RF compatibility

Hi, As I mentioned in another thread, there are examples of the Laowa 100mm Macro 2x f2.8 EF version (automatic aperture) that are not fully compatible with Canon RF mount cameras. Although they are lenses for full frame sensor, when mounted to a Canon Rx, they force the camera into crop mode (1.6x)...
by Ichthyophthirius
Sat Mar 06, 2021 12:25 pm
Forum: Equipment Discussions
Topic: Olympus U TLU tube lens vs SWTR-2 Superwide Head
Replies: 11
Views: 2727

Re: Olympus U TLU tube lens vs SWTR-2 Superwide Head

Ah, I see. So that only affects the corners and the sides are much better? Maybe then it's just a spec issue? Does Olympus say anything about the expected sensor size on the U-TLU? Maybe it's just enough for m4/3, their own cameras. Then it would make sense that the SW head covers a much wider area ...
by Ichthyophthirius
Sat Mar 06, 2021 1:47 am
Forum: Equipment Discussions
Topic: Olympus U TLU tube lens vs SWTR-2 Superwide Head
Replies: 11
Views: 2727

Re: Olympus U TLU tube lens vs SWTR-2 Superwide Head

The scope came with an analyzer slider, and I put a simple film polarizer over the field lens. I took photos with the analyzer in and out. Hi, Did you take the polariser over the field lens out as well? Using polarised light in brightfield can cause problems via internal refections in the trinocula...
by Ichthyophthirius
Sun Feb 28, 2021 1:08 pm
Forum: Beginners Macro
Topic: Macro gear for a beginner?
Replies: 7
Views: 8747

Re: Macro gear for a beginner?

Hi, It depends a lot on the type of subject (static or fast-moving) and on the reproduction ratio (0.5x - 1x you have many options; higher than 1x is more demanding on the equipment and technical skill and requires a lot of practice). Personally, I have used the following: 1) Canon EF-S 24mm f2.8 (a...
by Ichthyophthirius
Sun Feb 28, 2021 4:01 am
Forum: Equipment Discussions
Topic: This Just Seems Strange
Replies: 12
Views: 2276

Re: This Just Seems Strange

In this case, with a US seller listing 9400+ items, maybe it's just a lack of price research by the seller? They are selling such a potpourri of stuff. Between the "best offer" option, low postage costs, no need for a credit card, no new account, and no restocking fees, it might even be easier to bu...
by Ichthyophthirius
Fri Feb 26, 2021 2:30 am
Forum: Equipment Discussions
Topic: Nikon CFN Fluor / Planapo 100 160/0.17
Replies: 60
Views: 8119

Re: Nikon CFN Fluor / Planapo 100 160/0.17

viktor j nilsson wrote:
Thu Feb 25, 2021 10:03 pm
It's the only quantitative measurements I've been able to find. Would love to see more data like it.
Here we go :wink: Charles linked these snippets on his website:

https://krebsmicro.com/forumpix/CDM5.jpg
https://krebsmicro.com/forumpix/CDM4.jpg
by Ichthyophthirius
Wed Feb 24, 2021 9:55 am
Forum: Macro and Micro Technique and Technical Discussions
Topic: What's in the name: filter puzzles
Replies: 4
Views: 2970

Re: What's in the name: filter puzzles

Hi, I suspect the Schott glass names are chronological. They have a 150+ year history, it would be logical to stick to 1 name = 1 glass rather than constantly renaming them according to their property lineup. Apart from that, Schott: UG: Black and blue glasses, UV transmitting BG: Blue, blue-green, ...
by Ichthyophthirius
Mon Feb 22, 2021 2:52 pm
Forum: Equipment Discussions
Topic: Does anyone have the Laowa 100mm x2 macro lens?
Replies: 49
Views: 9762

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

The copy I had had thin patches of grease but not a thick layer.

You're right, it should be used with the Laowa front filter. Otherwise, it will collect lots of dust sticking to the grease film.
by Ichthyophthirius
Sat Feb 13, 2021 4:43 am
Forum: Equipment Discussions
Topic: Laowa 2x problem: forced crop mode on RF mount
Replies: 2
Views: 1215

Re: Laowa 2x problem: forced crop mode on RF mount

klevin wrote:
Fri Feb 12, 2021 1:32 pm
Is crop so bad?
{-( Unacceptable :D But in all seriousness, crop mode is 10 MP on the Canon RP. That's not using the lens to it's full potential, as it is supposedly quite good on full frame.
by Ichthyophthirius
Sat Feb 13, 2021 4:04 am
Forum: Equipment Discussions
Topic: Stereo Zoom Microscope - What to buy?
Replies: 11
Views: 2207

Re: Stereo Zoom Microscope - What to buy?

Hi Owen, Thank you for the clarification. I think the GXM is a none-starter. The magnification range you get is between 1x - 4.5x. At the higher end, these stereo microscopes optics are usually not very good; so the usable range is maybe 1x - 3x. There are many other affordable and superior optics a...