It seem to me it is an old model.
1.4 NA instead or 1.25 NA is not enough for low magnification.
The second lens of 0.3 is good almost for brightfield:
oblique illumination is not very effective with this second lens.
The aparture 1.4 NA is not mentioned on the description of this product.
I changed the lens with another condenser (1.25 NA) for increase the lighting and 3D effect of the oblique illumination.
Now, I am very satisfied of this product and I was able to make great pictures with 3D effect on my website microscopyviiew.com
This review was written in the old system and had content requirements that are different than reviews written today.