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Is there a way to use 35mm lenses on a S16 camera (with a PL mount) and have some sort of a speed booster that shrinks the S35 lenses to correctly cover the S16 camera (416, SR2/3, Aaton XTR). I know that if you add a convertor to a PL camera and you want to attach PL lenses you wont have the correct flange lens flange distance anymore, but is there a way around this?

I think for sure there would be a market, for all the reasons outlined above. Unfortunately it would require a completely new optical design to overcome the lack of flange depth space. The reason Speedboosters hit the market when they did was because of the space afforded by mirrorless camera flange depths. A focal reducer actually brings the image plane closer to the lens, so you end up having even less room for the reducing optics than the nominal difference in flange depths between lens mount and camera mount.

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There would be a market, but it would be fairly niche, limited to S16 PL cameras. So I suspect any manufacturer would baulk at the R&D costs to bring something like this to market, plus it would cost more than the current crop of speedboosters due to the extra optics required.

From vague memory, you would need at least 16mm of workspace between the film plane and the rear of a focal reducer aka speedbooster. You will not find that 16mm of workspace inside a rotating mirror-shutter reflex camera.

That workspace is for the Caldwell 0.71x Ultra optical cell which is not ideal for the Super16mm frame. You might just shoehorn it in with a custom assembly replacing the lens turret on a C-Mount Bolex H16RX5. There may be a C-Mount to M4/3 adaptor but the only versions I have found on eBay mount C-Mount lenses into a M4/3 camera, not the other way about so you have to get one made so that a Metabones PL to M4/3 Ultra 0.71x speedbooster could be mounted.

The Speedbooster for the original BMPCC would better suit the Super16mm frame optically but has to be even closer to the film plane (6mm) and would not fit in the available workspace of any Bolex as you will interfere with even the upright shutter disk path.

The RX5 Bolex has another wrinkle in that the prism path for the viewfinder changes the flange to focal plane distance compared to the Bolex non-reflex older H16 cameras. The in-air flange to focal plane distance may be shorter than when the prism splitter is in the optical path.

A 0.71x focal reducer may be most easily fitted if a custom C-Mount tail with M4/3-Mount front adaptor could be made. Otherwise it would come down to a custom rear tail for the 0.71x speedbooster. This is doable but introduces other difficulties including some very fine internal 0.5mm thread cutting.

Honestly one is better off finding a set of Elite or Optar lenses (maybe with a panther 35mm t1.3) to have a better range of focal lengths than the zeiss super speeds. IIRC you can use Digiprimes on a super16 film camera with the optex B4 to PL adapter as well.

I have an SL3. I am being asked more and more by my company to take photos of classes we are promoting on the manufacturers website. The problem is, I find myself more and more in low light situations. Obviously, I end up getting a lot of noise in my photos, and am getting a lot of motion blur due to having a slow shutter speed.

@cantsin I think he's saying he wants to use a speed booster with a c-mount camera, not get a booster for c-mount lenses. It'd be very possible to build a speed booster from EF or Nikon F mount to a c-mount if someone decided they really wanted to.

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I recently came across a discussion online about how a Speedbooster changes the field of view, depth of field and exposure. There was so much misinformation and conflicting statements about how they affect your lens or camera that the users who were giving correct advice were virtually drowned out. Therefore, I hope to dispel some of these mistruths by boiling down what a speedbooster actually does and how, before busting some common Speedbooster myths at the bottom.

Myth 1: When using a full frame lens on a Super 35 camera, the image is darker. Using a Speedbooster gives you the same exposure as if you were using the lens on full frame.

False, a lens used on any format will yield the same exposure. Using a Speedbooster will give you an image brighter than when used on full frame.

Myth 3: The depth of field gets thinner when using a Speedbooster.

False. Whilst the aperture does get faster which, in itself would reduce the depth of field, the lens also becomes wider in focal length, which increases the depth of field by the same factor. Assuming distance to subject remains the same, depth of field remains the same when using a Speedbooster. However, if you were to move closer to your subject to offset the wider field of view, depth of field would get thinner, but this is a result of reduced distance to subject and not the Speedbooster.

Myth 6: I can Speedboost Super 35 lenses.

Technically, yes, but not if you want to use them on a Super 35 camera. The most popular use for Speedboosters is to use full frame lenses on Super 35 cameras. This compresses the larger image circle onto the smaller format. Speedboosting a Super 35 lens is totally possible, however trying to do so on a Super 35 camera would result in hard vignetting (called portholing) as the image circle is now too small to cover the sensor. You can make use of speedboosted Super 35 lenses on even smaller formats such as Micro Four Thirds however.

Return to the previous room, and remember to find a nice long hallway with a backdoor escape as you wait for the EMMI to find you. Thankfully, even with its increased speed, it will slow down to stalk you as you fire off your Omega Stream to shatter its faceplate.

Moving right from the Save Station into the first Dairon room, and get some speed running past the Energy Recharge Station before crouching down in the middle of the room -- then rocket upward to create a path to the top floor, and the Yellow Teleportal back to Artaria.

What is the difference between a variable speed pump and a fixed speed pump? In general, a fixed speed pump motor operates at its rated speed regardless of the flow conditions. The pressure that is being produced by the pump is determined by the amount of water that is being demanded by the application.

In most applications where water is used, whether commercial or industrial, the demand for water pressure changes at different times of the day. A variable speed water pressure booster pump is designed to adjust the water output and keep the water pressure constant. By using a variable speed drive (VSD), a variable speed pressure booster pump can continuously optimize pump speed and power consumption and, at the same time, maintain constant pump outlet pressure.

Given these realities, what are the benefits of using variable speed drives on pumping system? VSDs are one of the best ways to improve the mechanics of water distribution systems. Most of the benefits can be categorized into three key areas:

In a constant speed booster pumping system, the pump does not change speed. Instead, pressure reducing valves throttle head pressure through friction and resistance. A variable speed booster pumping system allows for varying water pressures and flow rates to accommodate the demand of the building or application at any given time. The fact is that 80% of the time, a booster pump operates at 20% capacity or less. During low demand, a variable speed control slows the pump speed so a variable speed pressure booster pump can take advantage of pump and fan affinity laws.

When the speed of the motor is reduced, power is reduced. On a pump curve, generally the flow and head are changing at the same time. As flow increases, pressure capacity drops, and vice versa. When a variable speed water pressure booster pump is used, it reduces speed to match a constant discharge pressure by slowing the pump down as the flow decreases and the potential pump pressure increases. As the pump slows, based on affinity laws, the energy consumed is reduced by a factor of eight.

In some cases, the controller is a simple, manually operated control panel. In other cases, it can also be controlled by a more complex programmable logic controller (PLC) combined with a Variable Frequency Drive (VFD) that varies the frequency to the pump motor, speeding it up or slowing it down based on input from system variables such as flow, level or pressure. For automated control of the variable speed pressure booster pump, sensors gather data to indicated when pump speed needs to be increased.

The minimum variable frequency drive (VFD) speed for pumps to maintain flow depends on the system curve, especially the amount of static head, which varies depending on the application. To determine the minimum VFD speed for a pump, you need to analyze several parameters,

Often pressure sensors are used to measure the outlet pressure and send that data to the VFD so the speed of the pump can be adjusted accordingly. Some systems rely on another pressure switch to prevent the pump from outputting extreme pressure. In smaller pressure booster pumping systems, the pressure sensor is normally placed at the furthest possible location. For a larger VSD booster pump system, multiple sensors can be used, each placed in a critical area of the system, or different set points can be established depending on the number of pumps operating.

Any water booster pump operates by increasing water pressure, which forces the water to flow faster through hydraulic lines. However, in any pumping situation, flow velocity decreases as the pressure necessary for the movement of water increases. Booster pumps can provide most water at the highest flow rate at low pressure. If the water flows from the pump without restriction, it moves with a greater flow rate. 2351a5e196