#focal plane

Abstract Crack

Abstract patterns prevail in a bench in downtown Indianapolis

Sine Qua Non Photography: images by Nathanael Handlang

This Asahi Pentax S1a is mostly a standard Pentax from the late 1950s to mid 1960s. As a note, at this time “Pentax” was a model name, the maker being Asahi. Later, in the 1970s, Asahi changed the company name to Pentax and the model names became letters and numbers but not actual names. lens: Asahi Super Takumar focal length: 55mm apertures: ƒ/1.8 to ƒ/16 focus range: 0.45m lens…

“Hydroptics, Vol.2: Focal Grain”

Modernization also enhances the choices for the hunters to make their rifles more accurate and precise. Modern gear is introducing in the market. Many new things added due to the advancement of technology, extreme retail competition have driven the quality of good up. It also makes them affordable.

When you adjust the new riflescope, you can set the reticle on the first focal plane or the second focal plane. You can consider the ranges, tube sizes, turrets and many more things.

How do you know what is different between the first focal plane and the second plane, which is better? No worry, we will provide you information about the main differences between these two below content. Click here : opticsbible for extra information.

First Focal Plane

The first focal plane, also abbreviated as FFP, is a modern hunting tool, but now they have become trendy in modern scopes. It is very beneficial for long-range shooters.

The best thing about FFP is that when the scope is zoomed on the target simultaneously, the reticle is also zoomed in. It helps measure the distance between two hash marks precisely; there is no problem if the magnification range disturbs.

It makes your shooting accurate for longer distances without any effect of conditions. Another benefit of the first focal plane scope is that with BDC styles, reticles can use with elevation turrets to maximize the MOA adjustments with any given setup.

Second Focal Plane

The second focal plane is mostly used in the old rifles, and it helps the gun perform well in any of the given conditions. You can get more than 95 percent accuracy while using a second focal plane.

It is abbreviated as SFP; SFP is perfect for small range shooting. It is limited to up to 500 meters range. If you want to hunt an animal or hit a target from more than 500 meters, it is not suitable to use.

One of the remarkable things about these scopes is that with an increase of magnification. Reticles remain in the same size regardless of their power.

It means if you are using the BDC style reticles, then the given measurement will vary from magnification level to magnification level.

Suppose you will shoot a standard western caliber at 200 yards distance, and the magnification power of your scope is 4.5-14x, and you are using BDC style reticles.

Generally, we assume that on 5.4x, each hash or dot represents an approximate distance up to a 100-yard drop. For that, you increase the magnification level, which also changes the distance about that location.

Generally speaking, SFP is suitable for short-range hunting because its magnification affects measurement that varies with every new magnification.

Final Thoughts:

We’ve been talking about composition and, in the last few posts, about lenses as they relate to composition. Now we need to expand our discussion of lenses and talk about lenses as they relate to depth of field. 

In previous posts I’ve mentioned focal length, which is the distance over which a lens converges light rays. In these previous discussions, though I didn’t explicitly state it, we assumed that the light was being focused to a single point. But that’s not realistic. Since the sensor in your camera is flat and occupies an area something larger than a single point, in some cases quite a bit larger, it follows that the lens needs to achieve not just a single point of focus on the sensor but an entire plane of focus that covers the entire surface area of the sensor. This is the focal plane. 

Lenses are typically constructed from multiple layers of glass (or some other translucent material) where each surface of each layer is ground to an either concave or convex shape to promote and achieve proper focusing. The objective is to ensure that light rays of varying wave lengths passing through both the center and edges of the lens all arrive and focus at the flat plane of the sensor. This is not a trivial task. 

Which Is Not A Property Of Optical Telescopes

C O N T E N T S:

KEY TOPICS

For technical reasons, the largest optical telescopes are reflecting rather than refracting telescopes: it is easier to build and support large mirrors of high optical quality than large lenses.(More…)

Ground-based telescopes larger than Keck that will outperform even the Hubble Space Telescope (in the optical and infrared bands using adaptive optics ) are being built…

Ask Juan: Why do Dark Lines Form on Photos Shot Under Fluorescent Lights?

Got a question from a reader on Twitter over some strange camera performance.

@SomeGadgetGuy 1. Could you explain why this happens? I assume its static electricity? 1/2 pic.twitter.com/t8xUPzZO6n

— Vincent Soon (@Vsmh96) September 16, 2015

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The first time I ran into something similar on my DSLR I had a minor panic attack that my sensor was damaged. While it can…

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If there is one very big sin in shooting group photos: besides not posing everyone in the most flattering way that you can, it’s about not getting everyone in focus. It’s very easy for someone to photograph a couple and only end up with one person in focus with the other one blurred into oblivion…or the bokeh.

Don’t let this happen.

For starters,…