Is the imaging quality of "no reflex+adapter ring+SLR lens" higher than that of "SLR+SLR lens"?

If the model configurations are the same or similar, there is no difference in image quality between SLR and SLR lenses without reverse adapter ring, and even the image quality will be affected by adapter ring in some cases.

For a simple example, the non-inverting eos rp and SLR 6d2 using cmos of the same specification both use Canon SLR ef24- 105mm lens, and their imaging quality is the same as that of Zhong Bo. The premise is that in the same scene, you shoot the same subject, use the same composition, keep the same shooting distance, set the same focal length, use the same aperture, shutter and sensitivity, keep the focus absolutely accurate, and set the same photo format and size. You can't tell who is better.

Eos rp has no advantage over SLR cameras because there is no reverse design, but it also has a certain impact on shooting because of the addition of an adapter ring. When all the correction functions in the camera are turned off and shooting in RAW format, when eos rp connects ef24- 105mm lens with adapter ring, the 24mm wide-angle end will have obvious dark angle. This is due to the non-native design of the lens. In order to make the flange distance conform to the non-reverse design, the extended interval is increased, which has a certain influence on the light around the wide-angle end entering the camera. The dark angle is more obvious than the original design SLR, and the wider the focal length, the greater the impact. On a SLR camera, the effect of such a dark corner will be much smaller than that of no reflection. Some friends think that the imaging quality of the same lens is better than that of SLR, which may be based on the following considerations:

1, no focus, high precision, high focusing accuracy, more "solid" than SLR;

2. What you see is what you get, no need for reverse framing, easier exposure setting than SLR, and low photo exposure error rate;

3. The short flange distance of the mirrorless camera is easier to maximize the high-quality lens.

Let's analyze these points one by one.

First of all, theoretically, the focusing accuracy of mirrorless cameras is higher than that of SLR, but the success rate of high-end SLR is not worse than that of ordinary mirrorless cameras, and the focusing speed and tracking speed are higher. From a practical point of view, due to the advantages of focusing accuracy, the image quality has not been greatly improved. The lens on the SLR is out of focus, and it needs to be corrected from the fuselage and lens. It does not mean that the inverse ratio SLR has great focusing advantages. On the contrary, in some high-speed sports photography themes, the status of the top flagship SLR remains unshakable.

Second, real-time framing, using screen or evf framing can really observe the final exposure of photos directly with eyes, but users who are skilled in using SLR will not have much interest in this matter. As long as the exposure setting is accurate, there is no difference in image quality.

Third, the short flange distance without reflection can make the original lens better, with higher quality and larger aperture, which does have certain technical advantages, but the transfer of SLR lens can not improve the image quality, so we can only use the lens without reflection with higher quality.

Therefore, based on the above analysis, the SLR lens does not rotate better than the SLR camera of the same specification without the inversion ring.

Basically not.

1. The design of SLR lens is aimed at the requirements of SLR cameras. The old lens will not work well if it is transferred to a high-pixel body. Many photography teachers have never studied optical design. They can't explain the root cause to you, but they can tell you the actual situation. The actual situation is just not good enough. This reason is complicated to explain. The reason will not be expanded.

2. I have the best SLR lens, what will happen? I will answer you with a picture.

Look at the picture carefully.

In fact, after adding a high-quality adapter ring (the price of the adapter ring I bought is not bad), the fuselage is a little droopy. Look carefully.

That is, the optical axis is crooked.

So I am basically opposed to any form of transfer. It's too bad for advanced lenses.

Unless you buy an expensive factory adapter ring.

3. Matching of focusing performance.

If you focus manually, yes, you can really squeeze the performance of the lens.

If you use those autofocus adapters, sorry, you can't even focus. The performance of the lens will naturally not come out.

I wrote a paper about "out of focus". The focus will not "run". It's because your lens is not in the real focus, and the camera thinks it is, so the shutter is released. This reason is complicated to explain. The specific reasons are not discussed here.

To sum up:

Is the imaging quality of "no reflex+adapter ring+SLR lens" higher than that of "SLR+SLR lens"?

Answer: It is basically impossible.

Abnormal situation:

Advanced lens+factory adapter ring+manual focusing (image enlargement mode only)

First, the application cost is greatly reduced! Many non-standard lenses can be used.

Second, it is more convenient to use;

However, the picture quality may not be superior.

There are still many factors that determine the image quality.

This problem is at best flat or reduced. The core of SLR camera is to keep the focal plane and bayonet plane absolutely parallel, which is the best state. Traditional SLR only has three planes: imaging plane, bayonet plane and lens bayonet plane, so leveling is relatively simple. The micro-scale is composed of two-sided bayonet planes of the imaging plane bayonet plane adapter, and the parallelism of the five planes should be leveled. It's too difficult. So it can only be flat or reduced.

Not in theory. However, in actual use, it would be better if there is no reflection, because there is no reflector in the inverse proportion SLR, and the reflector produces less vibration during exposure, so the probability of obtaining clear photos is great. Generally speaking, the imaging quality is high.

So far, it is rare to see clear photos at the pixel level. However, after eliminating all the vibrations, it is difficult to make the photos of mechanical shutters clear at the pixel level, whether it is SLR or non-reverse. Electronic shutter can do it.

Canon SLR lens to Sony Quan Huafu micro single R system will definitely be improved.

The advanced nature of come makes sense.

For example, the correct usage of Canon 35l is to switch to Sony R series.

On the resolution level, push Leica m35 1.4a horizontally.

First of all, judging from the influencing factors of imaging quality, most of them will not have this problem.

Why?

This depends on our imaging principle, and the key factors of imaging are nothing more than:

1 sensor

2. Algorithm

camera lens

Here are three keys. Going back to the question mentioned in the title, it is nothing more than whether the picture quality is lower than that without the adapter ring. This adapter ring is actually like the audio port on our mobile phone, whether it is C port or 3.5mm port. They can listen to songs through the C port, or they can listen to songs directly through the headphones of the C port. The quality is essentially the same for our ears.

In addition, the adapter ring is only responsible for correcting the flange distance (it doesn't matter if you don't understand this word), but it only allows you to install the lens with other bayonets, and the original imaging quality will not change substantially. If it must be said that the shortcomings of the adapter ring may affect the focusing performance or accuracy, then the imaging quality of the lens in front of the adapter ring itself is what it should be (imaging), and the performance and quality of the fuselage behind the adapter ring will be what it should be, not because of the transfer.

After adding the adapter ring, the focusing performance is somewhat affected, and the imaging quality is related to the camera.

Let's take a look at the present non-inverted head, because shorter flange distance and larger aperture have more potential to exert optical performance. Now the same level of non-reflex head can surpass the SLR head, and it has a good development prospect in the future.