لكل سؤال جواب .. مجلة فن التصوير اللبنانية _ ع٤٢

Every question has an answer

Lenses and their technical functions

With appreciation for what you supply, please advise me of the following.
1 - The best zoom lens for portrait photography
For landscape photos.
2- The best macro lens.
3- I intend to buy a photo printing machine, but my problem is that I do not know the method of developing, and any device that prints colored and regular photos together.

Your friend Saeed bin Mubarak Al Mukhaini
Sultanate of Oman -

We have repeatedly mentioned that with portrait photos, it is preferable to use a telephoto lens, not a zoom lens.
The telephoto lens remains the best in relation to the accuracy and quality of the glass used, and therefore the possibility of correcting the dimensions remains the best and filtering the vision remains stronger. Here we advise you with a 105 mm lens. As for the zoom lenses, they are not ideal for photographing portraits »or landscapes. Carrying it from a moving glass will not come with integrated dimensions and vision.
As for the lens for shooting landscapes, the 5 mm lens remains ideal for such works, and an 85 mm lens can be used. As for the longer lenses, they are not able to record the scenes as they are by nature, due to their work
In addition, these lenses still face the problem of color saturation, as dust or atoms scattered in the air will not pass them.

If you want pictures of nature as it is without any distortions, you have to rely on the two lenses that we mentioned, but if you want some curves, and to obtain additional dimensions and effects,
Adopt a 28mm or 24mm lens.
And if you want a magnified scene with overlapping dimensions, you need a 135 mm or 200 mm lens
2 - The best macro lens is the standard 50mm macro lens, it is good for all uses, but if you are going to photograph insects or flowers with a larger character, you should use a 105mm macro lens.
3- When you want to buy a magnification device, you have to specify the possibilities of use. If it is only for black and white, here you will get a great saving relative to the price of the colored one, noting that the magnifier with a colored head can be used for the colored one and for the normal one.
As for black and white, it is used only for black and white.
So you can choose any 35 flag magnifier and 50 mm lens, as they all have the same specifications.
But if you shoot with films other than 35 mm - that is, 6 x 6 cm - then you should buy a 6 x 6 cm enlarger with an 80-flag lens and another 50 mm lens, which allows you to print all kinds of films.
Concerning your problem with acidification and printing, we have mentioned in previous issues a lot about the acidification process, and I will not mention it in lessons - the art of photography... starting from the next issue and within the principles and curriculum. And you, my friend, have to experiment in black and white, as experiences inevitably lead to experience ⏹

⏺ signature on the photo is necessary

Under many of the pictures we see the phrase “by an unknown photographer, so how can the photographer take a picture with his name on it, and is it appropriate for the photographer to put his name on the face of the picture, as is the case with paintings, and if this is appropriate, then what is the pen used and the method required for that?

Sana Jankat Irbid - Jordan

Your question, Sana’s friend, is new and very important, especially since many photos circulated by the press or the general public remain anonymous, and this is due to two reasons:
1- The photographer disregards the value of the photo he takes because he thinks at the time that it is not worthy of attention from a recording or artistic point of view, and thus he neglects to record his name and the facts of the photo - its date and location on the back - and so he presents copies of the photos or sells them .. and upon continuous circulation, the photographer becomes unknown .

2- There are many photographers who present photographic, artistic, and documentary works for the benefit of others, such as commercial or tourism establishments, or publishing houses, and some of them neglect to mention the name of the photographer or deliberately do so - according to the agreement. Here it is obligatory for everyone
A photographer not to print more than one photo of his snapshot, because repetition loses its material and moral value. He must also write down his clear name behind each photo in addition to its time.

But when the picture takes on an artistic character, especially when it is displayed as a painting, it must be signed on the face, and at one of the appropriate lower corners, so that the signature does not come with a black pen and on a shaded place. Note that whoever deals with the photographic work in its artistic framework must not withdraw or enlarge on his negativity except a copy of it, because the signed painting will take its artistic value - moral and material - and if it happens that we sold a signed painting, we must, with complete conviction, not make another one and sign it, because that will be lost The credibility of the illustrator, then it is necessary to make one signed painting, just like a plastic painting.
Signing paintings is not a difficult job. Any black, lukewarm pen can be used, especially with
black and white . It is also possible to use “white ink”, of which a portion is taken and used by a feather.

The colored paintings are signed in the same way as before, and gold or silver ink can be used, and with a quill. These chariots and chariots are also sold in large libraries, which are concerned with the artists’ supplies⏹

⏺ Newton's rings

I own a slide projector brand (Leitz) and I constantly find that the slides are exposed to damage inside the two glass slides in the projector, as the slide slide happens to expand and come into contact with one of the glass faces, where colored rings appear on the display screen that also extends to the outside. Is there a malfunction in the device and what is the solution.

Fadi Lahham
Beirut, Lebanon

These colored spots are Newton's rings, whose appearance results from close - but incomplete - contact between two transparent surfaces.
Newton's rings usually indicate the presence of some amount of moisture between the two surfaces concerned, and therefore one of the methods to avoid this situation is to keep the slides in a dry place that does not rust, away from moisture.
The other treatment is to increase the space between the film and the glass with plastic frames, by emptying the cardboard frames and putting plastic frames instead of them⏹