Jprusinski wrote:... I'm fairly new to this, so ... my budget is not going to have room for more than one lens ...
Wild Card recommendation.
You should consider a MFT SLR Magic 26mm f1.4. (Toy lens?)
Im being serious. It's a relatively inexpensive lens; good on the budget.
Its sharp; it will give you very artistic visual fidelity when shooting 4K DCI.
But; it strength shall come into play for HD Window.
Which helps reduce the cost of film capture & storage.
Breaking it down:
A generic MFT sensor at 17.3 x 13 mm has an image diameter (Circle IC) of 21.64000924 mm
BMPCC 4K (HD Window) at 8.8896 x 5.0004 mm has an IC of 10.1994602 mm
The ratio between the two being : 2.121681817
The SLR Magic 26mm f1.4 when shooting within the HD window effectively becomes
SLR Magic (HD Window) 55.16mm at f1.4.
You will be in the sweet spot of the lens. Which is sharp.
Because its inexpensive; I can imagine that you could get it + plus a lens of your choice. But it is very artistic - Please read reviews.
If you would like to fully utilize the HD function of the BMPCC 4K, it may be a good idea to look into C mount lens. A 1" lens as an IC of 16mm & 1/2" as is 8mm. But a 2/3" C mount has an IC of 11mm.
So any lens greater than 2/3" will provide you full sensor coverage HD window.
Alternatively,
You should consider getting an MFT lens that will work well with 4K and in HD.
Or a lens that is wide for 4K to HD scaling, and long in HD window.
So the above SLR lens can function as a 26mm f1.4 fast (Artistic) lens for low light 4K scaling down to HD.
And a longer (narrow FOV) 55.16mm f1.4 in HD.
Good luck
PS. I use it on the BMPCC which has an IC of 14.31 mm for HD. At that crop I do not get any artistic artifacts that the full MFT gets. Its cheap and OK.
EDIT:
Updated a mistake in my earlier port; need to fix.
Another positive I failed to mention about this lens is that it is 85g.
Possible future drone lens, or a lightweight glidecam; like the iGlide II (max weight 1.36Kg).
Its cheap; lightweight; sharp and a fast lens.