condenser insert set

[iconoclastica]

Has anyone tried one of these https://www.ebay.co.uk/sch/bauras/m.htm ... 7675.l2562 ?

I have always read these modifiers ought to sit near the diapragm, but in this contraption they are much lower. Isn't the position perhaps that important?

[deBult]

These are INSERTS into the condenser and close to the diaphragm. I’m pretty please with my set.

[iconoclastica]

These are INSERTS into the condenser and close to the diaphragm. I’m pretty please with my set.

What type of condenser are you using? On my 0.90 achromat the diaphragm resides c. 30mm above the bottom plate.

[KD Arvidsson]

Hi! I love my insertI have mine on a common abbe 1.25 on a Labophot 2 and i am very pleased//KD

[deBult]

These are INSERTS into the condenser and close to the diaphragm. I’m pretty please with my set.

What type of condenser are you using? On my 0.90 achromat the diaphragm resides c. 30mm above the bottom plate.

Olympus BH2 with standard Abbe condenser or Phase condenser.

[Saul]

...
I have always read these modifiers ought to sit near the diapragm, but in this contraption they are much lower. Isn't the position perhaps that important?
...
On my 0.90 achromat the diaphragm resides c. 30mm above the bottom plate.

Nikon Achr 0.90 is not the best candidate to use with DF inserts, because of the internal design (I fixed your drawing a little bit). Internal "opening" (green) does not allow to go closer to the aperture .
Of course, for the DIY purpose, opening could be widened, but it is kind a aggressive measure. It is doable, but not sure how many user are ready to make this kind of surgery on the own condenser. Abbe 1.25 are pretty cheap

condensator schematisch.jpg (44.06 KiB) Viewed 5552 times

[Crusty]

I bought a set for an Olympus BH2 from the same guy and I'm quite happy.

[iconoclastica]

Nikon Achr 0.90 is not the best candidate to use with DF inserts, because of the internal design (I fixed your drawing a little bit). Internal "opening" (green) does not allow to go closer to the aperture .
Of course, for the DIY purpose, opening could be widened, but it is kind a aggressive measure. It is doable, but not sure how many user are ready to make this kind of surgery on the own condenser. Abbe 1.25 are pretty cheap

That explains it. Also, I gather there are two different models of the achr 0.90 about, for my drawing was exact too (at least on the outside).
I will look for another condenser for this purpose, that seems to be the best way to go indeed.

thanks,

Wim

[Saul]

...I gather there are two different models of the achr 0.90 about, for my drawing was exact too (at least on the outside)...

Design is based on this model:

IMG_1766.JPG (107.13 KiB) Viewed 5516 times

[iconoclastica]

Mine:

c1.jpg (137.8 KiB) Viewed 5499 times

c2.jpg (101.32 KiB) Viewed 5499 times

[Saul]

Mine:

Hmm, depth looks different (or just perspective ? ), mine is 14mm ....

[iconoclastica]

It is real, not the perspective. Mine is between 7 and 7.5mm deep:

[attach]c3.jpg[/attach]

[Saul]

It is real, not the perspective. Mine is between 7 and 7.5mm deep

Thanks Wim, useful information !