Barry

Interesting…

Question about the two pictures with and without the WA attachment: These were taken with the unmodified Panasonic 3D lens?

George

   )) I too have tried the combination of macro and wide angle lens.))  

I assume what you mean by wide angle lens is an add-on wide conversion lens.
I had used these type of lenses on my Belplasca camera about 20 years ago. Those lenses had very strong widening effect like 0.45X.
The 37.5 mm camera lenses turned into 17mm. The near object distance fell under 1.00m from more than 2.00 m of the Belplasca.

I have however never used these add-on lenses again because they degraded the image quality.

Again when SDM came into use at 2007 I used a more modest pair of lenses of 0.6X strength on my Canon A570 camera at it's 35 mm setting. Although not as bad bad as the previous experiment, the image quality was compromised.
Lenses at $20- $30 range have less than mediocre quality. I have heard about a $200 lens for Fujifilm (notW3) but I will not try it.

If however original wide or extra wide lenses are used without any adds-on I personally prefer them mostly to normal or tele lenses.

One interesting point I want to share here after working with different focal length lenses is as follows:

"The front object image size at the stereo window depends only upon the stereo base , if the same amount of on sensor deviation is to be maintained"

In other words, it doesn't matter what focal length of lenses you use, the size of the front object will always be the same if you keep the same stereo base.  Assumed that the infinity is included.

I have a habit of trying to obtain a 1mm deviation on a APS-C sensor, either when shooting macro, normal range or hypers, with any lens.
This rule produces 3D images that are generally comfortable for my eyes to view.

I will give two examples to demonstrate the idea about the stereo base and the front object size relation. 

(What I mean by front object is the nearest object at the limit, that does not cause any window violation.
Think of it's size as of a semi transparent object where the stereo window occurs,that doesn't block the background view and doesn't cause excessive deviation)

Focal Length   :  50mm
Stereo Base    :  70mm
On sensor deviation : 1mm
Sensor size 15.6X23.6mm

According to the above data and previous requirements the front object distance has to be  3.50m  =  3500mm

The full object size at this distance that the sensor covers will be:

3500/50 X 15.6X23.6mm = 1092mmX1652mm =      1.09mX1.65m

If we change the focal length from 50mm to 500mm the front object  with the maintained 1mm deviation has to be at 35m  =  35000mm.

The object size at this distance with the 500mm lens will again be:
      
35000/500 X sensor size =  1.9m x 1.65m.

In other words Stereo Base X Sensor size X 1mm .

This equation as it is, is only true because I have chosen a value of 1mm  as on sensor deviation.
However if other values like 1.2 , 1.5 or 2.5 can be chosen according to the sensor or film sizes. I choose 0.5mm for half frame images.

In all these cases the image size at the stereo window will again depend only on the stereo base , but this time will be multiplied with constants like 1.2 , 1.5 or 2.5 ... regardless of the focal lengths.

The big difference will be seen only in the perspective (Proportion between the size of the near and far objects) of the overall photograph.

If we go back to shooting Macro 3D and using add-on lenses I sometimes use positive (convex) lenses on my macro lenses ,if I am not using the  Variable magnification lens.
This makes me get closer to the objects and enables me to photograph smaller objects, but it doesn't widen the view.
Because the base is fixed, I don't use lenses with strong diopter , otherwise getting too close would cause excessive deviation.

Oktay