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 Post subject: WILD M400 DSLR CONVERSION.
PostPosted: Wed Dec 26, 2018 12:47 pm 
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I thought that I would share a simple conversion just done to my recently acquired M400.
No images are necessary, its so simple.
1, remove existing pyramid.
2, retain and reverse the black base bracket.
3, obtain a iso38mm/T2 adapter and fit to the existing iso38 opening in the bracket, fixing with a set screw that you have just prepared.
4, use Cannon eos macro-tubes and screw to the T2 adapter.
5, obtain Baader varilock T2 extension either 29 or 46, and eos adapter.
6, mount camera and adjust for parfocality.
7, job done.!!

You can also obtain Pentax helicoid extension tubes in either M42 or K- mount.

This gives a cheap but useful adapter for a cropped frame dslr, and by adding a quality
tele-converter (x2), a full frame dslr can be used.
The teleconverter lens will effectively act as a photo-relay lens.


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 Post subject: Re: WILD M400 DSLR CONVERSION.
PostPosted: Mon Jan 21, 2019 4:41 pm 
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Yep that'll work for crop frames. All you need is a light-blocking tube that suspends the camera ~3-4 inches above the cover plate of the scope. Attaching full frames is a bit trickier if you care about parfocality. Where would you place the tele-converter?


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 Post subject: Re: WILD M400 DSLR CONVERSION.
PostPosted: Thu Mar 19, 2020 7:42 am 
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Tim wrote:
Yep that'll work for crop frames. All you need is a light-blocking tube that suspends the camera ~3-4 inches above the cover plate of the scope. Attaching full frames is a bit trickier if you care about parfocality. Where would you place the tele-converter?

Since posting the original time has passed on.
Not wishing to re-invent the wheel and since I have a lot of Wild/Leitz/leica bits and pieces in my "used" box I decided to repeat the Wild pathway using my spares.
For a full frame dslr:
Wild phtototube 40/14 304490
Wild x10 eyepiece fits into placement in above.
Wild phototube 10404207.
Wild 0.32 reducing lens 370759.
Wild holder for reducing lens/camera mount 162226
I was now in a position to re-manufacture the various tubes since I had a few of the reducing lenses.
This gives a tube factor of x3.2 ideal for full frame.
For a crop frame camera, x1.3/1.6 tube factor is the ideal hence the extortionate asking prices for the Olympus nfk x1.67 relay lens.The nfk x2.5 lens whilst not ideal, can be used
and married to a x0.8 reducing lens (I had one!) The critical factor for parfocality is the positioning of the relay lens and I plagerised a Nikon system for this.
Both these two systems work well with my Leitz Orthoplan and M400 scopes.


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 Post subject: Re: WILD M400 DSLR CONVERSION.
PostPosted: Thu Mar 19, 2020 5:03 pm 
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I'm glad to hear more about afocal adapters on this system.
I haven't tried it on thr m400 series but have on my compound Leitz which is basically the same set of adapters. I think this can be pushed further. Though I haven't had the need to since I use aps-c and direct projection is basically ideal for that.
The 0.32x lens is handy, but from what I've read and my own tests on my Leitz Ortholux II you can get even better results by using a quality pancake lens focused to infinity, 50mm for full frame or 40mm for aps-c (though with aps-c direct projection is hard to argue against). The 3.2x is basically a 60mm achromat.
A couple photos I took on my aps-c camera on my ortholux:
Image
Image taken with a 40mm lens overlaid on the full eyepiece view (full view taken with my cell phone)
Vs
Image
With the 3.2x lens
(Not good for quality comparisons because white abalance was all messed up by the fluorescence filter, just for sizing.)

That said, the makrozoom/apozoom provides an image big enough to cover ultra widefield eyepieces, even if the Wild head isn't designed to accept them. I suspect if you used a Nikon or Olympus ultra widefield 26.5mm eyepiece and a shorter focal length lens for afocal you could get even better coverage.

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