Is micro 4/3 dead? |
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beautiophile ![]() Senior Member ![]() Joined: 11 December 2014 Country: Vietnam Location: HCM City Status: Offline Posts: 216 |
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AFAIK, 4-time-energy is always true, not "if the same ISO". The light energy is the amount of photons hitting on the sensor/pixel and depends on the aperture (T-stop precisely), exposure time and surface area. It's a pre-processing quantity while ISO is a post-processing notation. The latter is the amplification of the signal produced by the photoelectric phenomena on the sensor. Also to correct Jonas, the aperture doesn't need to go with AoV (a.k.a. focal length) because the focal length is already included in the aperture value. |
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A330 ~ 16-80ZA
Alpha 7, Alpha 807si, Alpha 99 ~ Min 17-35G, 24-85, 28f2, 100Macro; SAL35F14G, SAL50F14. SAL70300G F20AM, F42AM, F58AM. |
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QuietOC ![]() Senior Member ![]() Joined: 28 February 2015 Country: United States Location: Michigan Status: Offline Posts: 3515 |
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The idea that say F4 and ISO 100 would be used by the same photographer on cameras of different formats to take the same picture is just wrong because those settings will produce different images.
If the photographer selected F4 on full-frame, they would have selected F2 on Four-Thirds because they would be aware of the depth-of-field that setting gives. ISO 100 may not even be an option on Four-Thirds, so likely the photographer has to have a much shorter exposure on Four-Thirds unless they have an ND filter. But they might choose to take a bunch of photos for an equal total exposure time which would effectively reduce the ISO to 25. Some Four-Thirds cameras do something similar automatically and even shift the sensor for each frame resulting in much higher resolution. Edited by QuietOC - 02 November 2018 at 03:10 |
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Sony A7RIV NEX-5T HVL-F45RM LA-EA5 Metabones-IV Sigma MC-11 Yongnuo EF-E II TLT ROKR MD-NEX KR-NEX DA-NEX
Minolta Maxxum 600si Pentax Q7 5-15 15-45/2.8 8.5/1.9 11.5/9 AF-P/Q |
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sybersitizen ![]() Senior Member ![]() Joined: 04 August 2006 Country: United States Location: California Status: Offline Posts: 14428 |
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See the words 'exposure time' in your paragraph? If the aperture is a fixed value, you change the 'amount of photons' by changing the exposure time and you change the exposure time depending on the ISO (or the degree of PP boosting you intend to apply if shooting ISOless). I don't think you've said anything of importance there. And why did you cut off the rest of my post where my main point was? Here it is again: If you instead keep shutter speeds the same and let ISO float as needed, then everything - including motion blur and camera shake - remains equal, right?
Huh? |
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LAbernethy ![]() Senior Member ![]() Joined: 25 November 2015 Country: Canada Location: Ajax, Ontario Status: Offline Posts: 2789 |
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it's not just the size of the sensor or size of the camera. My wife gave up her A57 for an OM-D EM-5 for better out of the box JPEG's to go with a smaller lighter camera. For me, i never warmed up to my OM-D EM-1. I got it to still be able to use my 4:3 lenses but find myself going back to my E-5 for the sheer joy of it. If Olympus had released the 16MP E-7 DSLR i would have been quite happy. |
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beautiophile ![]() Senior Member ![]() Joined: 11 December 2014 Country: Vietnam Location: HCM City Status: Offline Posts: 216 |
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Hi, sybersitizen, I trimmed that part to give my opinion only on the-same-ISO idea, and didn't disagree with what was cut and what you bold here. Sorry if that made you uncomfortable.
Av = (Focal length) / (Size of entrance pupil)? |
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A330 ~ 16-80ZA
Alpha 7, Alpha 807si, Alpha 99 ~ Min 17-35G, 24-85, 28f2, 100Macro; SAL35F14G, SAL50F14. SAL70300G F20AM, F42AM, F58AM. |
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Jonas A-R ![]() Senior Member ![]() Joined: 29 December 2007 Country: Denmark Location: Denmark Status: Offline Posts: 1645 |
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You are correct, although I still think the reference to the Kodak 110 film format might have some merit in why they chose this particular size |
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a9 a6300
21/2.8 Loxia 35/1.4Z 50/1.4Z 85/1.4GM 90/2.8G Laowa 100mm F2.8 Ultra Macro 100/2.8GM 135/1.8GM 12-24/4G 24-105/4G 100-400/4-5.6GM 2x TC |
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Jonas A-R ![]() Senior Member ![]() Joined: 29 December 2007 Country: Denmark Location: Denmark Status: Offline Posts: 1645 |
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Indeed. and the effect of diffraction will also be the same if you wish to include all blur sources ![]() However, nobody forces you to use the same shutter speed and under many circumstances it is possible to use longer shutter speeds or increase the amount of light. Thats why I objected to the statement in bold below which implicitly had the same shutter speed and scene brightness as a condition (let's keep pixel size out of it for now ![]() (3) If you keep the angle of view the same and also the optical aperture then the sensor collects the same amount of light whatever the sensor size you use, provided that the FL and F no. is altered to suit. FF has no more or worse dynamic range nor noise level than APS-C or micro 4/3 over the whole frame. Of course the sensor size does affect the relationship between pixel density and Mp size, and for the highest Mp it may well be easier and more effective to get this in a larger sensor. But if we stick with (say) 12Mp for low light use then the sensor size makes no difference provided we can get lenses designed to suit. Edited by Jonas A-R - 02 November 2018 at 06:18 |
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a9 a6300
21/2.8 Loxia 35/1.4Z 50/1.4Z 85/1.4GM 90/2.8G Laowa 100mm F2.8 Ultra Macro 100/2.8GM 135/1.8GM 12-24/4G 24-105/4G 100-400/4-5.6GM 2x TC |
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ABDurbs ![]() Senior Member ![]() Joined: 27 October 2011 Country: South Africa Location: Durban Status: Offline Posts: 1016 |
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I have used 1", MFT, APS-C and FF sensor cameras, and every single one of them produced an image that was "perfect" for what I use the majority of my images - Social Media, Club Competitions and the occasional large canvas or A4 print. I don't think I am unique.
The single biggest MFT drawcard for me (at my stage in life) is its size, because the better MFT cameras out there are more than capable of producing excellent images. I spent a week with an OM-D E-M1 Mark II & 12-40 zoom and I was extremely impressed with the quality of body, lens and images. The downside IMHO, is that the better MFT bodies and lenses are not necessarily good value for money, although compared to a top of the range FF camera and pro lens, they are still better priced. I for one, sincerely hope Olympus sticks around, because I love their well built, well speced bodies and lenses. I agree that Olympus, for instance, needs to capitalize on their USP which I believe, like others, is the size of their bodies and lenses. Unfortunately I think they have an uphill battle because the technical "babble" could drown out their well earned capabilities. Edited by ABDurbs - 02 November 2018 at 10:27 |
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Regards
Allan A99 + VG, A77ii + VG, 70-400G, Zeiss 85mm f1.7, CZ16-80, Tamron 70-200 USD Tamron 24-70 USD, HVL-43AM, Godox TT685S & X1T-S, Minolta 8000i, Minolta 50mm f1.7 |
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addy landzaat ![]() Senior Member ![]() Joined: 22 April 2006 Country: Netherlands Location: Netherlands Status: Offline Posts: 12951 |
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Yes, as I thought, this ended up in a equivalence discussion again, we had those so many times before and they always go the same. The topic was about the strengths and weaknesses of the m43 system. Thankfully some people still have an opinion on this!
@QuietOC: you're partly right. Sometimes the tool used dictates the outcome. Case in point: I take different pictures with the A77m2 then with the A6000, let alone the A99m2. There is more that influences my pictures. That why I think the equivalence discussion is not that relevant for most photographers. |
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ABDurbs ![]() Senior Member ![]() Joined: 27 October 2011 Country: South Africa Location: Durban Status: Offline Posts: 1016 |
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+1 |
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Regards
Allan A99 + VG, A77ii + VG, 70-400G, Zeiss 85mm f1.7, CZ16-80, Tamron 70-200 USD Tamron 24-70 USD, HVL-43AM, Godox TT685S & X1T-S, Minolta 8000i, Minolta 50mm f1.7 |
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adhox ![]() Senior Member ![]() Joined: 02 September 2016 Country: Australia Location: Melbourne Status: Offline Posts: 314 |
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I hate equivalence arguments. If I'm using my Pen F @ 12mm, I don't think of it as being like my A77ii @ 16mm, or my A99ii @ 24mm (I can't go wide enough on my 'blad to make the comparison there). It is what it is. Each size has pros and cons.
As for whether m43 is DEAD? No. I don't know its long term future, but it ain't dead yet. Maybe it won't survive, but either way, this video is about clicks rather than adding to the discussion. |
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pegelli ![]() Admin Group ![]() Dyxum Administrator Joined: 02 June 2007 Country: Belgium Location: Schilde Status: Offline Posts: 33736 |
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I think equivalence arguments and discussions have their merit in trying to figure out the strength and weakness of the different sensor formats.
However the strenth and weakness of camera systems go very far beyond only the sensors, so in my opinion in the discussion if micro 4/3 is "dead" it's only a minor aspect (or even off-topic). I don't think MFT is "dead", it might lose some market share to FF due to the fact these cameras are getting cheaper, however the size advantage as well as the sheer quality of many MFT offerings make them far from obsolete. |
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Jonas A-R ![]() Senior Member ![]() Joined: 29 December 2007 Country: Denmark Location: Denmark Status: Offline Posts: 1645 |
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A lot of equivalence hate going on here
![]() It’s a simple framework describing the shooting envelope of systems across different formats in terms of the visual properties of the photographs. It does not deal with other important aspects of a system such as size, ergonomics, AF quality etc etc etc which very well may be more important for a purchasing decision. Nevertheless, I find it useful in discussions on the relative merits of different formats and don’t get why it’s controversial or worthy of hate |
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a9 a6300
21/2.8 Loxia 35/1.4Z 50/1.4Z 85/1.4GM 90/2.8G Laowa 100mm F2.8 Ultra Macro 100/2.8GM 135/1.8GM 12-24/4G 24-105/4G 100-400/4-5.6GM 2x TC |
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addy landzaat ![]() Senior Member ![]() Joined: 22 April 2006 Country: Netherlands Location: Netherlands Status: Offline Posts: 12951 |
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It is not so much hate for equivalence - it is hate for the never ending discussion clogging up potentially interesting threats like this while not offering any insight in the question at hand. By all means, start a seperate thread to discuss equivalence.
Back to m34: Panasonic made a good decision to go full frame and skip APS-C, that makes their m43 cameras still relevant in this market. There is a USP for m43, I saw several mentioned in this thread! |
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