Refering to another thread,
(Post #63) where a similar definitive statement was made and there was confusion about the meaning of it: therefore, for clarity now, it is assumed the statement above is
NOT a joke.
I disagree with the statement.
Both Rufus and Randy have proposed reasonably complex questions and both are still supplying to the conversation necessary information, which has been requested of them.
The solution for each person is certainly NOT a "
no brainer" and might not necessarily be an EOS 5DMkII.
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Both Rufus and Randy may find it interesting that during 2015, several tests by reputable agencies suggested the 7D MkII as the best low light performer in the EOS range – apropos pattern noise and SNR. The next camera was the 6D.
Roger Clark's made one of these studies. Applicable to this thread his detailed technical testing for mainly Astro-photography and Night Photography using EOS 7D MkII.
If an EOS 7DMkII is presenting Final Images with undue high nose level, then it is most certainly operator error and or operator ignorance.
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Rufus:
The EF-S 10 to 22 is a very nice lens. As funds are not unlimited, a value for money choice, would be to make considerations to keep this lens and consider buying a 7DMkII, rather than changing formats and thereafter having to buy a new set of lenses. But I am unsure of the Filter System you have bought?
Is the filter system useless on the 10 to 22 wider when that lens is wider than 17mm Focal Length?
Another consideration is, whether or not you wish to employ TS-E Lenses - in which case there is much more leverage in using a 135 Format (aka "Full Frame") camera for the TS-E lenses. An EOS 6D would be worth your due consideration as a value for money option, in this case.
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Randy:
Astro-Photography can broadly be classified into “with trails” and “without trails”. It makes sense that you’d want to avail yourself of the full FoV of the 14mm Lens that you own.
If you want predominately want “without trial” when using an F/2.8 lens, the major criterion would be to have a camera with the lowest noise values at its high ISO - i.e. ISO3200 to ISO6400 and maybe it will be necessary to extending to 128,000 when using an F2/8 Lens: the reason for this is to attain the necessary (relative) short exposure time to eliminate trails.
If you want predominately “trails” - or you do not mind if you have “trails” - then as per Dan K’s comments –
you’ll mostly be shooting at or near base ISO.
So even though this genre of night photography is "low light" it does not usually necessitate using an high ISO: in fact, as an example, previously, many notable night landscape shots were made using
Ektachrome Professional 64 (obviously) at exposure times longer than 1 second. (These took advantage of the rich colour effects which is an anomaly of that film's reciprocity feature).
This is mentioned because the relevant point being that Night Landscape Photographers chose "ISO" 64 for their best work, and ISO 64 is lower than the base ISO for most (all?) DSLR's . . . most Night Landscape Photographers use base or close to base ISO; you might like to research the work of
Colin Southern, previously a member here at CiC.
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A Photographer who is (supposedly) planned an prepped for either Architectural Photography and/or Night Landscape Photography and who does not include a suitable Tripod and Head in his/her kit – is simply NOT planned and prepped: thus rendering the argument of -
sometimes without a tripod and being Hand-held - non sequitur at the least, or a nonsense at the most.
WW