FS7: Cinema lens advice for FS7 film shoot

Donny 123 said:
OMG is that really your point.. yes I know that.. everyone knows that.. but the end effect is a narrower FoV.. you agree to that ?.. so you can say the 50mm FF on a smaller sensor .. in this case APS-C .. with have an "equivalent " FoV" of a 75mm.. .. I mean really thats what got you all fired up.. holidays must be fun .. :)
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Lol Donny, I’m sure you do know that, but you are expressing yourself really poorly on this subject.
 
Back on topic:

If the OP wants to save money on lenses, maybe use different lens adapters on the FS7, one Speedbooster and one normal adapter will effectively give you two lenses for the price of one.
 
My experience with the Canon 24-105 on a speed booster is that it can exaggerate inherently poor chromatic aberration in that lens and I've seen horrible artifacting . There have been many examples of this on the web. I'm happy you've gotten good results but I certainly wouldn't recommend it not for drama especially. I dumped mine. Also my experience was that the iris ramps which is also a problem though maybe less for narrative than doc. Not my favorite lens as you can gather.
The Sigma seems to be a much better lens optically though it sounds like different copies vary in how close they come to being par focal. The 2 Iested were wildly off but other people claim to have ones that are nearly perfectly par focal.

Re crop factor: the concept is useful but some people refer to FF as a standard, and others are referencing APS-C as normal and that gets terribly confusing.
 
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Run&Gun said:
I think the term “crop factor” needs to go away(but I know it’s not). I understand it’s purpose: to help people transitioning from one format(sensor size) to another to easily convert to something they can relate to in their head, but it seems to do more harm than good(creates confusion and misunderstanding). The way that most people talk about “crop factor” it makes it seem like someone is magically losing something putting a “FF” lens on a s35 sensor vs. a s35 lens on a s35 sensor. Any given focal length will have a given FoV on a given sensor size, period.
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Yes agreed.. my point only was the OP might know what a 50mm s35mm prime lens will "look" like.. but renting a FF 50mm will give a more telephoto "look" FoV.. and thats something to consider when ordering which lenses to use.. between FF and s35mm its pretty straight forward though.. the main confusion comes from people from a stills background thinking FF is the "Standard " frame size for video/film ! and calling that 35mm.. just seen Lenny post.. agreed sir ..
 
Liam Hall said:
Lol Donny, I’m sure you do know that, but you are expressing yourself really poorly on this subject.
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By not stating the crop is in the sensor and not the lens.. I guess I presumed wrongly the esteemed members of this forum would probably know that .. but thanks for your clarification :)
 
Donny 123 said:
Yes agreed.. my point only was the OP might know what a 50mm s35mm prime lens will "look" like.. but renting a FF 50mm will give a more telephoto "look" FoV.. and thats something to consider when ordering which lenses to use.. between FF and s35mm its pretty straight forward though.. the main confusion comes from people from a stills background thinking FF is the "Standard " frame size for video/film ! and calling that 35mm.. just seen Lenny post.. agreed sir ..
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That's an important point. If I rent a 50mm, I don't want 70mm results. If that's the case, I wonder then if I need to go wider on the full set to compensate. Or, do I get something like the Sigma Cine zooms which are s35. It's probably gonna be a trip to the shop to test stuff out and ask questions, but I figure I'd go in with some early knowledge.
 
Abaddon said:
That's an important point. If I rent a 50mm, I don't want 70mm results. If that's the case, I wonder then if I need to go wider on the full set to compensate. Or, do I get something like the Sigma Cine zooms which are s35. It's probably gonna be a trip to the shop to test stuff out and ask questions, but I figure I'd go in with some early knowledge.
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Most prime lenses aren't FF.. but the Sigmas are.. Sigma 18-35/50-100 cine zooms are s35.. they are good and cheap but the 50-100 breathes like a 80 year old coal miner.. but thats pretty much the only big draw back with them.. 24-35 zoom is FF.. but yes best idea to go in and have play with some lenses .. get their advise and probably most importantly what deals they will give with what lens sets.. focus travel is something to consider if no focus puller as most cine primes will have around 300 degrees.. so impossible to do your own focus all day long..
 
Not sure if it was mentioned (or if this is common knowledge because of CP.3s), but there are big savings on a few CP.2 PL lenses at B&H (and maybe other places).

Zeiss.jpg
 
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"If I rent a 50mm, I don't want 70mm results. " This is an inherently confusing sentence, unless you reference what sensor size your talking about.

It doesn't matter whether you use a full frame or a APS- lens - a 50 is a 50 is a 50 - forget about it when comparing lens to lens. The only question is what is the field of view on the smaller APS-C size sensor vs full frame. If you're used to Full frame then understand that you will get an apparently more telephoto image. That's where crop factor comes in.
 
Donny 123 said:
OMG is that really your point.. yes I know that.. everyone knows that.. but the end effect is a narrower FoV.. you agree to that ?.. so you can say the 50mm FF on a smaller sensor .. in this case APS-C .. with have an "equivalent " FoV" of a 75mm.. .. I mean really thats what got you all fired up.. holidays must be fun .. :)
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If you rent a 50mm nikkor stills lens or a 50mm cooke cine lens and put them on an S35 camera the FOV will be the same - a mild telephoto.

There is so much confusion here on such a basic thing.
 
morgan_moore said:
If you rent a 50mm nikkor stills lens or a 50mm cooke cine lens and put them on an S35 camera the FOV will be the same - a mild telephoto.

There is so much confusion here on such a basic thing.
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You seem also to be confused sir..Its not a stills V,s Cine lens thing .. its a FF V,s s35mm thing..(s35mm is not FF).. if the Cooke cine lens is FF .. they will have the same FoV on a smaller APS-C sensor .. but if the Cooke 50mm is s35mm .. they will be different .. that lens is designed for the sensor of the camera it is attached to..it will give a 50mm FoV..as video/film people know it.. the FF 50 is attached to a camera with a smaller sensor that its designed for .. the image it projects onto the smaller sensor will be cropped ,and give an "equivalent " FoV of a 75mm s35mm lens.. its all Canons fault for making the 5D.. FF sensors were never a thing in the video world.. so we have crop factors for video people to understand what FF lenses will give them.. and stills people to understand hopefully that FF is not a standard format in video/film.. and it doesnt mean s35mm.. although it probably will be a standard format in 10 years time..
 
Liam Hall said:
WTF. I take back my earlier comment saying you understand this Donny. You are wong. 100% wrong.
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Could be .. :) .. but please tell what's wrong.. there is a crop factor no..? a ff lens is on an APS-C sensor , it will have a narrower FoV than on a FF sensor camera .. there is a 1.5 crop.. is that wrong.. have I lost my mind .. or what's left of it .. ?
 
Donny 123 said:
Could be .. :) .. but please tell what's wrong.. there is a crop factor no..? a ff lens is on an APS-C sensor , it will have a narrower FoV than on a FF sensor camera .. there is a 1.5 crop.. is that wrong.. have I lost my mind .. or what's left of it .. ?
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Yes, that’s wrong. Yes, you have lost your mind.

I’ll draw you a picture. Give me a min.
 
I've used red for obvious reasons lol.

Imagine both images are created with 100mm lenses, one FF and one APS-C.

Image Circle.jpg
 
Liam Hall said:
I've used red for obvious reasons lol.

Imagine both images are created with 100mm lenses, one FF and one APS-C.

View attachment 135127
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Thanks for the diagram.. but how does that change that a 1000mm FF lens on an APS-C sensor won't have a narrower FoV. than a 1000MM APS-C lens... isn't it showing that.. if I have a 50mm FF lens on my A7III and I press the button for APS-C sensor "mode" .. my FoV changes.. it really does.. Im sure Im not imagining it.. sorry I need some more explaining of your point sir ..

Ah ok I think I see what you're saying.. but my point is.. if you are used to what a 1000mm APS-C lens will give you on an APS-C camera.. you have used it 100 times this month.. you know the shot you will get.. BUT you drop that lens in the lake and rush to rent another 1000mm lens but this time they only have a FF 1000mm lens.. which you have never used before.. you put it on your camera.. and its not the same shot had with the 1000mm APS-C lens..from the same camera position ..the FoV is narrower .. as per your lovely diagram.. surely this is correct .. the "number" on the side of a FF lens will not give you the same shot as the "number" on the APS-C lens as it were .. for film/video people who have not used FF lenses its useful to be aware of the crop factor.. but yes a 1000mm is a 10000mm and will be forever and ever.. blah blah and all that .. but in the field or lake .. the FoV between the two,FF/APS-C will be different..on an APS-C camera.. as your diagram shows.. ????.. and this is not correct .. say it aint so
 
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