Was du über die Blende F4 noch nicht wusstest! 📸 Fotografieren lernen

AmazingNature Alpha

26 Jan 202406:43

Summary

TLDRThe host welcomes viewers to his photography YouTube channel, stating his goal is to creatively discuss aperture. He says F4 lenses are much cheaper than F2.8 lenses due to production costs. F4 lenses also have greater depth of field, helpful for beginners. However, F2.8 enables shorter exposure times and lower ISOs. Still, F4 lenses suffice for most situations, with the Sony 70-200 F4 Mark 2 being an excellent example. The video explains differences between F4 and F2.8 lenses regarding pricing, depth of field, sharpness, and light transmission, providing photography tips along the way.

Takeaways

😀 F4 lenses are much cheaper than F2.8 lenses due to lower production costs.
👍🏻 F4 lenses provide more depth of field than F2.8 lenses.
🔎 F4 lenses can be slightly sharper than F2.8 lenses.
📐 F2.8 lenses allow twice as much light as F4 lenses.
⚖️ F2.8 lenses allow faster shutter speeds or lower ISO than F4 lenses.
💡 Most photographers do not need F2.8 lenses, F4 is sufficient.
🎯 The Sony 70-200mm F4 lens is a great, relatively affordable option.
🔭 Other good F4 zoom lenses include 24-70mm and 28-70mm.
🤔 Canon and Sony both make good 24-105mm F4 standard zooms.
💰 Consider F4 lenses first before deciding if you need more expensive F2.8 glass.

Q & A

Why are F/4 lenses much cheaper than F/2.8 lenses?
-F/4 lenses are cheaper because they require smaller glass elements that are easier and less expensive to manufacture and polish to high precision.
How does depth of field compare between F/4 and F/2.8 lenses?
-F/4 lenses provide greater depth of field compared to F/2.8 lenses when using the same focal length and camera sensor.
In what ways can F/2.8 lenses allow more flexibility than F/4 lenses?
-F/2.8 lenses allow using faster shutter speeds or lower ISOs. An F/2.8 lens gathers twice as much light as an F/4 lens.
When might an F/4 lens be preferable to an F/2.8 lens?
-An F/4 lens may be preferable for landscape or group photography where greater depth of field is desired. F/4 lenses are also usually sharper across the frame.
What are some examples of good F/4 zoom lenses?
-Some good F/4 zoom lenses are the Sony 70-200mm F/4 G OSS and the Canon EF 24-105mm f/4L IS II USM.
Why does the presenter warn against the Sony 70-200mm F/4 (first generation)?
-The presenter says the first generation Sony 70-200mm F/4 is not as sharp compared to other 70-200mm lenses and recommends upgrading to the Mark II version.
When might an F/2.8 lens be necessary over an F/4 lens?
-An F/2.8 lens may be necessary for photography in very low light conditions, for extreme background blur, or for professional sports/wildlife photography requiring fast shutter speeds.
What is an advantage of F/4 lenses for beginner photographers?
-F/4 lenses provide greater depth of field, which gives beginners more margin for error in focusing and composition.
How does using a wider aperture affect image sharpness?
-Using a very wide aperture like F/2.8 can slightly reduce overall image sharpness compared to a more moderate aperture like F/4.
What is an example of when shutter speed flexibility of F/2.8 is beneficial?
-The ability to use very fast shutter speeds with F/2.8 can help freeze action in sports, wildlife, or low-light photography.

Outlines

00:00

📽️ Introductory paragraph welcoming viewers and introducing topic of aperture

The host Michael welcomes viewers to the Amazing Nature Alpha YouTube channel and says they will be talking about aperture in a creative way. He acknowledges viewers may have different levels of photography experience and says they will start with some basic facts about aperture f/4.

05:01

💡 Benefits and tradeoffs of f/4 vs f/2.8 aperture

Michael explains f/4 lenses are much cheaper than f/2.8, mainly due to production costs since f/2.8 requires larger glass elements with more precision polishing. He gives the example of the new Sony 70-200 f/2.8 costing 3000 euros vs a fraction of that for the f/4 version. He also notes f/4 gives you greater depth of field than f/2.8, allowing you to get more of a scene in focus. However, f/2.8 gives you the ability to use faster shutter speeds.

Mindmap

Keywords

💡aperture

Aperture refers to the size of the opening in a camera lens that controls the amount of light entering the camera. The video discusses the differences between f/2.8 and f/4 apertures. f/2.8 lets in twice as much light as f/4, enabling faster shutter speeds or lower ISOs. However, f/2.8 lenses are much more expensive due to larger glass elements. The video advises f/4 is sufficient for most users.

💡depth of field

Depth of field refers to the portion of a scene that is in focus. Larger apertures like f/2.8 produce shallower depth of field. f/4 gives greater depth of field, allowing more of a scene to be in focus. The video suggests this can be useful for beginners photographing produce markets.

💡sharpness

Sharpness refers to the clarity and fine detail in a photograph. The video claims f/4 lenses can be slightly sharper than f/2.8, because f/2.8 is such an open aperture. However, sharpness also depends on the specific lens.

💡shutter speed

Shutter speed is the amount of time the camera sensor is exposed to light. Larger apertures enable much faster shutter speeds. The video shows f/2.8 allows shutter speeds twice as fast as f/4 in the same lighting conditions.

💡ISO

ISO measures the camera sensor's sensitivity to light. Larger apertures allow using lower ISOs for the same exposure. The video demonstrates an f/2.8 lens can use half the ISO of an f/4 lens at the same shutter speed.

💡autofocus

Autofocus refers to a camera's ability to automatically achieve sharp focus on subjects. The video praises the fast, accurate autofocus of the Sony 70-200mm f/2.8 GM lens.

💡telephoto

Telephoto refers to long focal length lenses that magnify distant subjects. The video frequently references popular 70-200mm f/2.8 and 70-200mm f/4 telephoto zoom lenses.

💡wide angle

Wide angle refers to short focal length lenses that include more of a scene. The video mentions the Sony 24-70mm f/4 as an example wide angle zoom lens.

💡 bokeh

Bokeh refers to the aesthetic quality of out-of-focus areas in a photograph. Larger apertures like f/2.8 produce smoother, more pleasing bokeh. The video does not directly mention bokeh.

💡low light

Low light conditions require larger apertures, faster shutter speeds, and higher ISOs. While not stated directly, the video implies f/2.8 lenses can be advantageous for low light photography.

Highlights

F/4 lenses are much cheaper than F/2.8 lenses due to lower glass costs from smaller lens elements

F/4 lenses offer greater depth of field compared to F/2.8 lenses with the same focal length and sensor

F/4 lenses can be slightly sharper overall than F/2.8 lenses due to less wide aperture

Most photographers do not need F/2.8 lenses, F/4 lenses work great for landscapes and portraits

F/2.8 gathers twice as much light as F/4, allowing shorter shutter speeds or lower ISOs

Going from F/4 to F/2.8 allows doubling the shutter speed or halving the ISO

Sony 70-200mm F/4 G OSS II lens is very compact with fast autofocus and macro capability

Canon and Sony 24-105mm F/4 lenses are very popular and capable zoom lenses

F/2.8 lenses allow capturing images in lower light situations than F/4 lenses can

F/4 lenses are more affordable options compared to F/2.8 lenses

Going from F/4 to F/2.8 allows shorter shutter speeds or lower ISOs

F/2.8 lenses are not always necessary, F/4 lenses are great for most situations

Sony 70-200mm F/4 lens is very compact and capable zoom lens

Explained differences between F/4 and F/2.8 lenses regarding light gathering ability

Hope to help beginners understand capabilities of F/4 vs F/2.8 lenses