Is there a need for F1.4 lenses....

Started 4 months ago | Discussions thread
Dericali Regular Member • Posts: 181
Re: Is there a need for F1.4 lenses....

Dericali wrote:

DenImage wrote:

Dericali wrote:

DenImage wrote:

Dericali wrote:

DenImage wrote:

Dericali wrote:

Philnw2 wrote:

https://www.dpreview.com/opinion/4682142293/when-fast-ish-is-fast-enough-in-praise-of-f1-8-lenses?utm_source=self-desktop&utm_medium=marquee&utm_campaign=traffic_source

I thought it would be interesting to get a "Sony" perspective on f1.4 or faster lenses. The above article is well written by Barney Britton.

Quote: There is still a demand for F1.4 and faster lenses, but that's not the same thing as saying that there is a need for them

There is an interesting figure in the article showing bokeh from an f1.8 lens to an f1.4 lens, and the f1.4 lens is superior - no doubt. but the bokeh from the f1.8 lens was fine by me as well. More revealing perhaps was the size comparisons between an f1.8 and a f1.4 lens in the article. Substantial size and cost differences.

Anyway, i thought that Britton "hit it out of the park" with regard to summarizing the differences between "normal" size lenses and the more exotic.

As someone who aspires to take beautiful portraits I certainly want to have at least one f1.4 lens in my bag.
However I don't think it's necessary at all focal lengths - I'm planning to pick up a 35mm, and the weight and size (and prize) are bigger considerations.

This picture was taken with the 85mm at f1.4. Certainly if I was shooting at 1.8 I could not have achieved the same effect.

Umm, ok,

What is it that you like about this photo?

Wouldn't a macro lens be a better option for this type of shot?

Den

This photo is a prep shot for a shoot where I want to use bold coloured specular highlights in a portrait.

(I don’t like to post portraits on a forum. )

It’s meant as a demonstration of the shape of bokeh at f1.4 on this lens, if you use the f1.8 version you will get cats eyes. This translates through to smoother backgrounds when you want to shoot narrow DOF.

Is the image you posted a crop of a corner or the center?

I previously owned the Sony FE 85mm f1.8, and like most lenses you only get cateye shaped bokeh balls towards the corners. The only current lens I've seen that doesn't do this is the 100mm STF.

Den

It's not a crop. You can see that the lighter bokeh balls that are off centre are spherical.

In every sample I've seen from the 85mm f1.8 there is distortion in the shape of the bokeh balls as soon as it's off-centre, obviously more extreme at the far edges.

The 85 f1.4 is not perfect of course but it's very good.

This review gives a pretty good overview and some comparisons, though not with the f1.8

https://phillipreeve.net/blog/review-sony-fe-85mm-1-4-gm/

Actually, the bokeh balls with the 85mm f1.4 GM are cateye shaped towards the edges/corners as well:

Den
That has not been my experience.

What is the image you posted of? Is this a single point of light somehow reflected, or is each light point an individual point of light entering the sensor plane at the same angle? If it's the former, I'm guessing that the shape is some kind of artefact from reflecting the light source.

Here is an image that does not display the same effect outside of the centre. (shot at f2)

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