I now use Marelux macro port 71 for the Tamron 90 macro with 20mm extension, Sigma 105 macro with port 71 and 30mm extension, Sony 70-200 F/4 macro from 100 to 200 with port 71 and 100mm of extension and the new Sony 100mm should work with port 71 and 45mm of extension a 30mm and 15mm. The Sony 90mm would also work with the port 71 but needs a 25mm extension which Marelux does not now offer. For travel being able to carry two or three macro lenses with only one macro port and extensions I would already be carrying for other lenses is a big upside.

The photo is the macro port 97 (the Sony 90mm port) using 75mm's of extension with the 70-200mm macro which is 1mm longer than the 71 port combo.

Edited Tuesday at 08:03 PM3 days by Phil Rudin

Nice! I'd like to think that 30mm N100 extension which I use for WACP-C will work also with existing N100 macro port! New lens is 19mm longer than the old one. And for TC when TC if TC just another extension. Keeping travel light! 😁

The questions is how EMWL will work with this?🤷

Edited Tuesday at 08:07 PM3 days by RomiK

B&H Photo specs show the 100M being 17.4mm longer than the old 90M. I think this will present a problem in N100 because the shortest N100 port extension is I believe 30mm which would leave a gap of 12.6mm using the N100 105 macro port for Sony 90mm. You may need to workout something using the N100 to N120 where you will have a wider verity of combinations with flat ports and extensions. With what appears to be such a great lens I am sure NA & MX will offer new ports to match the lens.

I use my 90 with 25 adapter (N100-N120) + 20mm ext + 60mm macro port, which is spot on.

For the 100 I could add 20 by using 35mm adapter + 30mm ext... (All Nauticam stuff).

Does anyone know if it is internal focusing?

3 hours ago, dentrock said:

I use my 90 with 25 adapter (N100-N120) + 20mm ext + 60mm macro port, which is spot on.

For the 100 I could add 20 by using 35mm adapter + 30mm ext... (All Nauticam stuff).

Does anyone know if it is internal focusing?

Found it on Camera Pro, mentions it is internal fcous. It does have lots of external switches, hopefully accessing them wont be required UW. The pre-release price is $AUD 2599! Not many specs listed on their page.

is there no compare .... with a SMC ( for example) vs putting the 1.4x/2x convertor on it

PetaPixel

Sony's New 100mm f/2.8 Macro GM Is Its Best Macro Lens Ever

Sony's new macro lens incorporates the past decade of its optical advancements.

9 hours ago, Phil Rudin said:

B&H Photo specs show the 100M being 17.4mm longer than the old 90M. I think this will present a problem in N100 because the shortest N100 port extension is I believe 30mm which would leave a gap of 12.6mm using the N100 105 macro port for Sony 90mm. You may need to workout something using the N100 to N120 where you will have a wider verity of combinations with flat ports and extensions. With what appears to be such a great lens I am sure NA & MX will offer new ports to match the lens.

I would disagree on a problem - current N100 90mm port doesn't fit the lens with cap so it sits pretty tight. I am estimating worst case scenario with 30mm extension is the gap of like 20mm between the front element and the port glass so it shouldn't even vignette and certainly it won't be able to focus on front glass.

The EMWL implications are unclear to me - if any, I just can't picture what kind of woodoo the focus unit does. Canon 100mmRF lists both #2 and #3 for its FOV but what kind of effect the extra 20mm between the lens and the focus unit will have I just can't picture 🤷

I have considered the physical dimensions of the lenses and TCs and figured out how to house them within the Nauticam N100 system:

First the physical dimensions of lenses and TCs, together with the extensions recommended by Nauticam (recommended extensions for Sony 100mm combinations calculated from physical length difference to the 90mm lens):

Secondly, the N100 flatports and N100 extensions that are, at present, available (before using a specific flatport, I would better ask at Nauticam whether the inner diameter of the port and possible obstacles (e.g. focus knob) are compatible with the assembly (I am sure they have the lens and all items and can test out)):

=> Already at the current state it should be feasible to house the new Sony 100mm macro using the 105mm flatport with the 30mm extension (as Romi writes), but, as Phil writes, there will be a gap of 12,6mm between front of the lens and the glass of the port, what may be unpleasant, especially when wetlenses as e.g. SMC-1 are to be used (also less than perfectly cleaned portglass will lower IQ the more, the larger is the gap). The 105mm flatport, however, will work together almost perfect with the 1.4xTC using a 35mm extension and probably, quite reasonable, with the 2x TC using the 50mm extension (a gap of 5,3mm will be present).

A huge number of combinations of flatports and extensions is possible, here, as one example, the housing using the N100 macroport55:

=> Both lenses and Sony 100mm with both teleconverters fit perfect. Exception is the pure Sony 100mm macro lens, but the gap of 2,6mm should also be o.k (normally extensions are fabricated at 5mm intervalls and the next, best fitting, extension is chosen (maybe even the 30mm & 35mm extension would fit perfectly (2,4mm too short in theory), but this has to be tested out by someone who has these extensions at hand))). ...

Edited Wednesday at 12:57 PM2 days by Architeuthis

Best case scenario, Sigma 105 is 135.6 and uses N100 110 port, Sony 100M is 147.9mm minus 135.6=12.3, 110 port plus 12.3=122.3. So to be in the ballpark you need a 122.3mm port. NA N100 32mm port + 90mm's of extension is going to work well I think, so three N100 30mm extensions or the New coming N100 50mm + a 40mm extension. Anyone interested I have a like new N100 40mm for sale. This will work much better with SMC's, EMWL and others. A sloppy 12 to 20mm gap will not work with EMWL and will reduce magnification greatly with SMC type lenses and yes a few will vignette.

Choice number two wait for the new 100M port which I am sure will be coming.

I am hopeful that the 16mm port extension (made by Saga) that I used to use for the 5T lens - will work for the 100mm and the 90mm port. But I won't know until I get a lens. Otherwise I will use the 20mm - which I have three N100 ones (one from Saga, two from Nauticam - although I am not sure these were ever actually offered for sale).

Actually long term I'd like a dedicated Tamron 90mm port, which is slightly shorter than the Sony 90mm. And then I'd be able to just use a standard N100 20mm port extension for the Sony 100mm. As I don't think I will travel with the Sony 90mm once the Sony 100mm comes out. Only the Tamron 90mm.

I've no idea when the lenses will ship - but when they do I will happily test what fits (although I appreciate not everyone has the 16mm port extension).

I have been long awaiting for this lens to arrive (since initially investing an a new A1 back in 2021). After a few years of just using the CMC, I couldn't wait any longer; and I finally cracked in January 2024 and bought the aging 90mm for my upcoming trip to Lembeh - in hopes to get better macro, which it delivered on in spades.

Overall it's been a great lens; but I also won't miss it much. And I'm very excited this lens is finally here. I recently did a trip to Bonaire with the Sony 90mm + MFO-3 and loved that combination. But I hope/think it will be even better with the 100mm.

I would also be surprised if Nauticam doesn't have a purpose built port (and or) extensions for this lens available within a month of it's release. They've done far more work for a much smaller market (like making the Canon V1 housing that I also purchased). A port has to be one of the easiest things they can manufacturer; probably takes them less than an hour in CAD to produce the file for the machines.

Edited Wednesday at 08:12 PM2 days by insomniac

It looks straight forward for Isotta users like myself. They have both a 17mm and 20mm extension to add to the port for the Sony 90mm, or they have an 80mm extension that could add to the port for the Sony 28-60mm (since last year that port is available with the front 67mm threads specifically for use with the WWL-1B).

I had a brief moment of excitement when I saw the 100mm f2.8 GM listed for AU$1927 before realising it is the older lens and not the new macro.

On 10/1/2025 at 9:40 PM, Alex_Mustard said:

I am hopeful that the 16mm port extension (made by Saga) that I used to use for the 5T lens - will work for the 100mm and the 90mm port. But I won't know until I get a lens. Otherwise I will use the 20mm - which I have three N100 ones (one from Saga, two from Nauticam - although I am not sure these were ever actually offered for sale).

Actually long term I'd like a dedicated Tamron 90mm port, which is slightly shorter than the Sony 90mm. And then I'd be able to just use a standard N100 20mm port extension for the Sony 100mm. As I don't think I will travel with the Sony 90mm once the Sony 100mm comes out. Only the Tamron 90mm.

I've no idea when the lenses will ship - but when they do I will happily test what fits (although I appreciate not everyone has the 16mm port extension).

My shop in Germany told me, that shipment is expected in week 44. October 27th to 31th

Easy (but a bit bulky) solution for Nauticam housings:

N100 to N120 35.5mm + N120 Macro port 87 = 122.5mm (close to 122.4mm)

Edited 6 hours ago6 hr by Alex725

1 hour ago, Alex725 said:

Easy (but a bit bulky) solution for Nauticam housings:

N100 to N120 35.5mm + N120 Macro port 87 = 122.5mm (close to 122.4mm)

N120 Macro port 87 is 110mm long.

20 minutes ago, Sokrates said:

N120 Macro port 87 is 110mm long.

I think it’s +87mm „effective“ length inside the port.

Am I wrong here?

My calculation is: 25.5mm inside the housing + 35.5mm (effective) N100 to N120 + Macro Port 87 is +87mm effective = 148mm which a little bit more than the 147.9mm of the lens.

7 minutes ago, Alex725 said:

I think it’s +87mm „effective“ length inside the port.

Am I wrong here?

My calculation is: 25.5mm inside the housing + 35.5mm (effective) N100 to N120 + Macro Port 87 is +87mm effective = 148mm which a little bit more than the 147.9mm of the lens.

But also the camera body doesnt sit right on port opening, its some 30mm inside the housing.

Sorry bad picture.

Edited 2 hours ago2 hr by Sokrates

Here's a look (i know it's not the best) at the A1 housing with the current Sony 90mm mounted to the camera with the N100 to N120 (NA-37305) adapter installed. Appears to be about 66mm from the edge of the adapter. I would appreciate a solution that used this adapter; as it would make switching from shooting macro to my FCP-1 slightly less burdensome. If things fit together as I would expect; it would be 66mm(ish)+17.4 = 83.4mm (within 3.7mm of the Macro Port 87 which seems reasonable to me - but I could be wrong).

Edited 1 hour ago1 hr by insomniac