Viltrox 85mm f/1.8 Test (andrea tasselli)

Celestial hemisphere: Northern · Constellation: Ursa Minor (UMi) · Contains: NGC 188 · Part of the constellation Ursa Minor (UMi) · The star 24UMi · The star 74Dra · The star 75Dra · The star 76Dra · The star Polaris (αUMi) · The star Yildun (δUMi)

Powered byPixInsight

Viltrox 85mm f/1.8 Test

Powered byPixInsight

Viltrox 85mm f/1.8 Test

This test is for the Viltrox medium tele, the PFU RBMH 85mm f/1.8, here in its first incarnation. This lens is a big fellow, weighting more than 620 grams and sporting a 66mm front lens. This lens replaces my earlier Nikkor AIs 85mm f/2 which proved too soft for any astro work below f/4. This lens is unbelievably sharp even at its maximum aperture of f/1.8 (47.2mm of aperture), but affected at that aperture by LCA (violet halos) despite the ED glass. Here the lens is tested at f/2 which proved to be a sweet spot between f/1.8 and f/2.2, thus compromising between LCA (well corrected at f/2.2) and aperture. Correction of colour is good with just a hint of LCA (which can be corrected in post-processing) and field aberrations (essentially astigmatic field curvature) which are more restrained than at f/1.8 while central sharpness is as high as it can be (with FWHM well below 2), giving raise to significant aliasing problem on the X-T1 (which doesn't have an anti-aliasing filter). The maximum circle is well corrected, with just a touch of field curvature at the very edge. A splendid lens at very affordable price, if you are into mirrorless cameras.

AstroBin Platform open discussions community forum

Lens Tests

Please note: The following tables are updated every 24 hours.

Distribution of astrophotographers

This table shows the number of distinct astrophotographers who have been assigned and IOTD/TP award compared to the total number of images awarded.
	Distinct awarded users	Total awarded images
Image of the day
Top picks
Top pick nominations

Distribution of subject types

This table shows the distribution of awards per subject type, compared to the popularity of images of that subject type.
	Image of the day	Top pick	Top pick nominations	Total submitted
Deep sky
Solar system
Extremely wide field
Star trails
Northern lights
Noctilucent clouds
Landscape

Distribution of data sources

This table shows the distribution of awards per data source, compared to the popularity of images acquired from that data source.
	Image of the day	Top pick	Top pick nominations	Total submitted
Backyard
Traveller
Own remote observatory
Amateur hosting facility
Public amaeteur data
Professional, scientific grade data
Mix of multiple sources
Other
Unknown

The “AstroBin Image of the Day and Top Picks”, or IOTD/TP, is a long-running system to promote beautiful, interesting, peculiar, or otherwise amazing astrophotographs, with a focus on technical excellence. Learn more.

Submitted The date and time when you submitted this image for IOTD/TP consideration.	...
Views by Submitters (available since September 19th, 2023) Every image is assigned to 50% of available Submitters. In the event that at least 80% of them don't view the image before its time in the IOTD/TP process expires, it's assigned to the other 50% of Submitters and the process begins anew.
Promotions by Submitters When 3 distinct Submitters promote the image, it moves on to the next stage of the process: evaluation for Top Pick status. This requirement, in addition to anonymization of images and distribution to only a subset of them, prevents biases and ensures that the best images are selected.
Promotions by Reviewers When 3 distinct Reviewers promote the image, it moves on to the next stage of the process: evaluation for IOTD status.
Early dismissal Staff members have a lot of images to inspect on a daily basis, and they can dismiss images if they believe they don't meet the requirements for IOTD/TP selection. If an image is dismissed 5 times, it's removed from the process. This streamlines the process and ensures that any bias present in promotions could be overruled by other staff members.

Status	Basic success
Started	...
Astrometry.net job	5479504
PixInsight job	n/a
PixInsight queue size	n/a
PixInsight stage	n/a

Image Index:

Contribution Index (beta):

Viltrox 85mm f/1.8 Test

Viltrox 85mm f/1.8 Test

Equipment

Acquisition details

Description

Comments

Sky plot

Histogram

In these public groups

In these collections

		...
You have no new notifications.

Image Index:

Contribution Index (beta):

Viltrox 85mm f/1.8 Test

Viltrox 85mm f/1.8 Test

Equipment

Acquisition details

Description

Comments

Sky plot

Histogram

In these public groups

In these collections

Notifications

AstroBin is in READ ONLY mode

Sorry :-(

Sorry :-(

Sorry :-(

Are you really sure?

Warning!

Warning!

Are you sure?

Report abuse

Slideshow settings

IOTD/TP stats (last [x] days)

Distribution of astrophotographers

Distribution of subject types

Distribution of data sources

Sorry

Sorry

Share

Upload new revision

Upload uncompressed source (XISF/FITS/PSD/TIFF)

Delete image and all its revisions?

Delete original image?

Delete all other versions?

Delete all revisions?

IOTD/TP stats

The following people like this image

The following people bookmarked this image

Warning

Flag malfunctioning thumbnails

Contains

Remove yourself as a collaborator

Plate-solving information