Leicameter 4 - onödigt köp?

När jag borde kunna använda den här? ....den är arvegods från min salig avlidne fader, den använde han ju till sin Zeiss Ikoflex på 50-talet med alldeles utmärkt resultat! Lathunden nedan kanske har samlarvärde idag och är därför synd att slita på....

Jag och så  så jag funderar på om jag möjligen behöver en sån här....eller är det bara nördigt?

Jag har redan formulerat frågan på engelska...nån översättning behöver ni väl inte?

"I use my black M4 body almost always with the wide angle lens Super Angulon 21mm f3,4, and with hyper-focal distance setting and an aperture of 8 or 11, it´s perfect for street photography I think…I´m really impressed with the results I get on Tri-X 400 film, and this has given me an exiting retro-renewal of my black & white experiences from the 1960- and 1970ties. Although I also regularly use my extensive Canon EF digital equipment, I also fully enjoy the the analog b&w photography!

I have question re. the M4 use:

I recently have bought me a Leica Viewfinder 21mm, (rather expensive but very useful) and now I can see how much the lens covers in the picture. It is attached to the camera in the accessory shoe on the camera.

To get the correct exposure, I have the ambition to refine my intuition of lighting conditions and exposure settings, but sometimes I have to check exposure values by using the Luxmeter app in my iPhone 8. It is somewhat tedious at times, but it is safer for important pictures but slows me down a lot.

I have understood that there is (was?) a Leicameter 4 black, but it is neither cheap, eBay prices around 300 dollars, nor easy to find in Sweden. Is it a good (recommendable) Leica accessory? Are there Zeiss or Voiglander cheaper equivalents? And, the main issue for me ….to be attached in the accessory shoe on the camera…? (which is already occupied by my Leica Viewfinder 21mm)

Do I therefore have to decide what is more important…a) the correct exposure, or b) how much the lens covers in width and/or height in my picture?

I hope you understand my "dilemma light" and I am convinced that anyone out there can provide me with a valuable suggestion!

Frankly speaking, to improve my lighting and exposure setting intuition, in the way and preferably to the extent that the experienced newspaper photographers "back in the old days" must have achieved that, is probably an unreachable goal for a 72 year old Leica freak like me…. "
/B

Ps. I´m sure you all know why using that lens on my M6 instead is no solution!