Old Camera Crop Factor, Barry?

KyleProhaska

Veteran
I'm trying to determine how my old camera setup compares to the AF100, specifically when it comes to FOV and crop factor.

My old setup was an XHA1 with a Letus Extreme. I used the same lenses on it I use now which are Nikon Primes. The A1 has a 1/3rd chip and required me to zoom onto the ground glass of my Letus to zoom point 72 or so out of 1000. The internal lens on the A1 is as follows:

4.5-90 mm (32.5-650 mm; 35 mm photo equivalent)

So based on that zoom estimate I landed at about 61.56mm on the internal lens or 444.6mm as a 35 mm photo equivalent.

I'm trying to figure out what the crop factor is on the lenses I put on this old setup. Also, I'm wondering what size chip the Letus simulated for me giving me the DOF. To my knowledge zooming in on the ground glass was basically giving the camera a new "chip" on which to record info, right? That's the basic idea. So does it really matter at all what zoom point I was at? Does zooming in and focusing on that basically cancel out the 1/3rd chip and internal lens to a degree?

I need a math wiz here. :)

EDIT: Just found out the frame size in the Letus35 Extreme is 46x30, larger than the 35mm full frame size (36x24), and much larger than 24x18 (academy frame size). To my knowledge I didn't zoom very far into the GG, but just enough to escape any dark edges.
 
Hmm I think I have figured this out. Looks to me that my old setup gave me the FOV the 5D gives me with the exact same lenses, but the DOF is a little less. It's not 7D like DOF but just a little deeper than my 5D. Even so, it explains to me why I've been frustrated with the AF100 a little bit lol. It's not the cameras fault at all, I was just used to an older setup and what I was used to it giving me.

Indoors on my last film the 50mm Nikon was the gold standard to use...perfect balance between DOF/FOV and distance to subject which is important when working in a real house with limited room. With the AF100 I'm essentially stuck with my 28mm to keep those parameters the same, but my DOF is cut significantly.
 
I guess I'm more likely now to dump my AF100. Just a personal choice. It's a great cam in the right circumstances, but I'm not so sure it's what I'm looking for. Either the DSLRs and going with the advantages (and disadvantages) of those, or it's spending more money and going for an adapter setup and the advantages/disadvantages of that.

Hard choices to make. AF100 has been a pretty good camera but maybe it's just not for me given what I'm looking for. Won't know unless you try! :)
 
It's been fun! Good luck with everything. :thumbsup:

I guess I'm more likely now to dump my AF100. Just a personal choice. It's a great cam in the right circumstances, but I'm not so sure it's what I'm looking for. Either the DSLRs and going with the advantages (and disadvantages) of those, or it's spending more money and going for an adapter setup and the advantages/disadvantages of that.

Hard choices to make. AF100 has been a pretty good camera but maybe it's just not for me given what I'm looking for. Won't know unless you try! :)
 
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